10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________

FORM 10-Q

____________________________

(Mark One)

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2014

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to

Commission file number: 0-32259

____________________________

ALIGN TECHNOLOGY, INC.

(Exact name of registrant as specified in its charter)

____________________________ 

Delaware	94-3267295
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification Number)

2560 Orchard Parkway

San Jose, California 95131

(Address of principal executive offices)

(408) 470-1000

(Registrant’s telephone number, including area code)

 ____________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See definitions of “large accelerated filer,” “accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer	x	Accelerated filer	¨
Non-accelerated filer	o  (Do not check if a smaller reporting company)	Smaller reporting company	¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The number of shares outstanding of the registrant’s Common Stock, $0.0001 par value, as of April 25, 2014 was 81,635,404.

ALIGN TECHNOLOGY, INC.

INDEX

PART I	FINANCIAL INFORMATION	3
ITEM 1.	FINANCIAL STATEMENTS (UNAUDITED):	3
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS	3
	CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)	4
	CONDENSED CONSOLIDATED BALANCE SHEETS	5
	CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS	6
	NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS	7
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	22
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	34
ITEM 4.	CONTROLS AND PROCEDURES	34
PART II	OTHER INFORMATION	35
ITEM 1.	LEGAL PROCEEDINGS	35
ITEM 1A.	RISK FACTORS	35
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS	49
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES	49
ITEM 4.	MINE SAFETY DISCLOSURES	49
ITEM 5.	OTHER INFORMATION	49
ITEM 6.	EXHIBITS	50
SIGNATURES		51

Invisalign, Align, ClinCheck, Invisalign Assist, Invisalign Teen, Vivera, SmartForce, SmartTrack, Power Ridge, iTero, Orthocad, iCast and iRecord, among others, are trademarks and/or service marks of Align Technology, Inc. or one of its subsidiaries or affiliated companies and may be registered in the United States and/or other countries.

2

PART I—FINANCIAL INFORMATION

ITEM 1 FINANCIAL STATEMENTS

ALIGN TECHNOLOGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share data)

(unaudited)

	Three Months Ended
	March 31,
	2014		2013
Net revenues	$	180,646	$	153,580
Cost of net revenues	43,395		40,731
Gross profit	137,251		112,849
Operating expenses:
Sales and marketing	52,888		42,281
General and administrative	29,179		30,348
Research and development	13,380		11,282
Impairment of goodwill	—		40,693
Impairment of long-lived assets	—		26,320
Total operating expenses	95,447		150,924
Operating profit (loss)	41,804		(38,075		)
Interest and other income (expenses), net	601		(988		)
Net income (loss) before provision for income taxes	42,405		(39,063		)
Provision for income taxes	9,961		2,920
Net income (loss)	$	32,444	$	(41,983	)
Net income (loss) per share:
Basic	$	0.40	$	(0.52	)
Diluted	$	0.39	$	(0.52	)
Shares used in computing net income (loss) per share:
Basic	81,120		81,248
Diluted	82,817		81,248

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

3

ALIGN TECHNOLOGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands)

(unaudited)

	Three Months Ended
	March 31,
	2014		2013
Net income (loss)	$	32,444	$	(41,983	)
Net change in cumulative translation adjustment	106		(55		)
Change in unrealized gains on available-for-sale securities, net of tax	42		3
Other comprehensive income (loss)	148		(52		)
Comprehensive income (loss)	$	32,592	$	(42,035	)

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

4

ALIGN TECHNOLOGY, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except per share data)

	March 31, 2014			December 31, 2013
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	182,766		$	242,953
Marketable securities, short-term	183,677			127,040
Accounts receivable, net of allowances for doubtful accounts and returns of $1,798 and $1,733, respectively	126,183			113,250
Inventories	15,840			13,968
Prepaid expenses and other current assets	43,711			47,465
Total current assets	552,177			544,676
Marketable securities, long-term	138,929			101,978
Property, plant and equipment, net	79,093			75,743
Goodwill and intangible assets, net	84,388			85,362
Deferred tax assets	22,739			15,766
Other assets	8,315			8,622
Total assets	$	885,641		$	832,147
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	18,506		$	17,718
Accrued liabilities	71,349			80,345
Deferred revenues	81,000			77,275
Total current liabilities	170,855			175,338
Other long-term liabilities	18,033			22,839
Total liabilities	188,888			198,177
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued)	—			—
Common stock, $0.0001 par value (200,000 shares authorized; 81,632 and 80,583 issued and outstanding at 2014 and 2013, respectively)	8			8
Additional paid-in capital	759,768			729,578
Accumulated other comprehensive income	442			294
Accumulated deficit	(63,465		)	(95,910		)
Total stockholders’ equity	696,753			633,970
Total liabilities and stockholders’ equity	$	885,641		$	832,147

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

5

ALIGN TECHNOLOGY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Three Months Ended
	March 31,
	2014			2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$	32,444		$	(41,983	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Deferred taxes	12,769			931
Depreciation and amortization	4,776			4,944
Stock-based compensation	9,132			6,410
Excess tax benefit from share-based payment arrangements	(13,568		)	(7,739		)
Impairment of goodwill	—			40,693
Impairment of long-lived assets	—			26,320
Other non-cash operating activities	1,977			(444		)
Changes in assets and liabilities:
Accounts receivable	(13,939		)	(10,002		)
Inventories	(1,870		)	(320		)
Prepaid expenses and other assets	(1,790		)	(586		)
Accounts payable	265			1,611
Accrued and other long-term liabilities	(15,286		)	(7,941		)
Deferred revenues	3,083			(1,476		)
Net cash provided by operating activities	17,993			10,418
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(4,996		)	(5,608		)
Purchase of marketable securities	(157,919		)	(3,282		)
Proceeds from maturities of marketable securities	53,137			4,366
Proceeds from sales of marketable securities	10,564			—
Other investing activities	(133		)	1,079
Net cash used in investing activities	(99,347		)	(3,445		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	11,946			13,268
Common stock repurchases	—			(2,438		)
Excess tax benefit from share-based payment arrangements	13,568			7,739
Employees’ taxes paid upon the vesting of restricted stock units	(4,453		)	(3,141		)
Other financing activities	—			(5		)
Net cash provided by financing activities	21,061			15,423
Effect of foreign exchange rate changes on cash and cash equivalents	106			(37		)
Net (decrease) increase in cash and cash equivalents	(60,187		)	22,359
Cash and cash equivalents, beginning of the period	242,953			306,386
Cash and cash equivalents, end of the period	$	182,766		$	328,745

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

6

ALIGN TECHNOLOGY, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Note 1. Summary of Significant Accounting Policies

Basis of presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, or “Align”) in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") and contain all adjustments, including normal recurring adjustments, necessary to present fairly our results of operations for the three months ended March 31, 2014 and 2013, our comprehensive income (loss) for the three months ended March 31, 2014 and 2013, our financial position as of March 31, 2014 and our cash flows for the three months ended March 31, 2014 and 2013. The Condensed Consolidated Balance Sheet as of December 31, 2013 was derived from the December 31, 2013 audited financial statements. Net revenues by geographic area for prior period amounts in Note 12 have been reclassified to conform with the current period presentation. These reclassifications had no impact on our financial position for the three months ended March 31, 2014 and 2013.

The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014 or any other future period, and we make no representations related thereto. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Quantitative and Qualitative Disclosures About Market Risk” and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in our Annual Report on Form 10-K for the year ended December 31, 2013.

Use of estimates

The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States of America (“U.S.”) requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to the fair values of financial instruments, long-lived assets and goodwill, useful lives of intangible assets and property and equipment, stock-based compensation, income taxes, and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.

Recent Accounting Pronouncements

In July 2013, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-11, "Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force)." The amendments in this ASU provide guidance on the financial statements presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. An unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward with certain exceptions, in which case such an unrecognized tax benefit should be presented in the financial statements as a liability. The amendments in this ASU do not require new recurring disclosures and are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this standard in the first quarter of 2014 had the effect of reducing our accruals for uncertain tax positions by $8.4 million, with an offsetting reduction in our long term deferred tax assets, but had no effect on net income.

7

Note 2. Marketable Securities and Fair Value Measurements

As of March 31, 2014 and December 31, 2013, the estimated fair value of our short-term and long-term marketable securities, classified as available for sale, are as follows (in thousands):

Short-term

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	67,332	$	10	$	(1	)	$	67,341
Corporate bonds	59,282		42		(14		)	59,310
U.S. government agency bonds	22,794		17		(6		)	22,805
Asset-backed securities	13,934		8		(1		)	13,941
Municipal securities	9,613		13		—			9,626
U.S. dollar dominated foreign corporate bonds	8,102		8		(2		)	8,108
U.S. government treasury bonds	2,546		—		—			2,546
Total Marketable Securities, Short-Term	$	183,603	$	98	$	(24	)	$	183,677

Long-term

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds	$	45,844	$	41	$	(49	)	$	45,836
U.S. government agency bonds	31,077		11		(4		)	31,084
Asset-backed securities	20,501		5		(5		)	20,501
U.S. government treasury bonds	20,598		15		(1		)	20,612
U.S. dollar dominated foreign corporate bonds	13,783		2		(17		)	13,768
Municipal securities	7,114		15		(1		)	7,128
Total Marketable Securities, Long-Term	$	138,917	$	89	$	(77	)	$	138,929

Short-term

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds	$	29,079	$	10	$	(4	)	$	29,085
Commercial paper	54,318		10		—			54,328
U.S. government agency bonds	16,693		10		—			16,703
U.S. dollar dominated foreign corporate bonds	13,959		12		—			13,971
Municipal securities	7,006		11		(3		)	7,014
Asset-backed securities	5,937		2		—			5,939
Total Marketable Securities, Short-Term	$	126,992	$	55	$	(7	)	$	127,040

Long-term

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	38,138	$	1	$	(21	)	$	38,118
Corporate bonds	23,308		14		(9		)	23,313
U.S. dollar dominated foreign corporate bonds	19,485		27		(17		)	19,495
Municipal securities	8,326		13		(8		)	8,331
U.S. government treasury bonds	6,916		3		—			6,919
Asset-backed securities	5,800		4		(2		)	5,802
Total Marketable Securities, Long-Term	$	101,973	$	62	$	(57	)	$	101,978

8

 For the three months ended March 31, 2014 and 2013, realized gains were immaterial. Unrealized gains and losses for our available for sale securities as of March 31, 2014 and December 31, 2013 were also immaterial. Cash and cash equivalents are not included in the table above as the gross unrealized gains and losses are not material. We have no material short-term or long-term investments that have been in a continuous unrealized loss position for greater than twelve months as of March 31, 2014 and December 31, 2013. Amounts reclassified to earnings from accumulated other comprehensive income related to unrealized gain or losses were immaterial for the three months ended March 31, 2014 and 2013.

Our fixed-income securities investment portfolio consists of corporate bonds, U.S. dollar dominated foreign corporate bonds, commercial paper, municipal securities, U.S. government agency bonds and asset-backed securities that have a maximum maturity of two years. The securities that we invest in are generally deemed to be low risk based on their credit ratings from the major rating agencies. The longer the duration of these securities, the more susceptible they are to changes in market interest rates and bond yields. As interest rates increase, those securities purchased at a lower yield show a mark-to-market unrealized loss. The unrealized losses are due primarily to changes in credit spreads and interest rates. We expect to realize the full value of all these investments upon maturity or sale. The weighted average remaining duration of these securities was approximately 11 months and 10 months as of March 31, 2014 and December 31, 2013, respectively.

As the carrying value approximates the fair value for our short-term and long-term marketable securities shown in the tables above, the following table summarizes the fair value of our short-term and long-term marketable securities classified by maturity as of March 31, 2014 and December 31, 2013 (in thousands):

	March 31,		December 31,
	2014		2013
Due in one year or less	$	183,677	$	127,040
Due in one year to 27 months	138,929		101,978
Total available for sale short-term and long-term marketable securities	$	322,606	$	229,018

Fair Value Measurements

We measure the fair value of our cash equivalents and marketable securities as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We use the GAAP fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. This hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value:

Level 1 — Quoted (unadjusted) prices in active markets for identical assets or liabilities.

Our Level 1 assets consist of money market funds and U.S. government treasury bonds. We did not hold any Level 1 liabilities as of March 31, 2014 or December 31, 2013.

Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Our Level 2 assets consist of commercial paper, corporate bonds, U.S. dollar dominated foreign corporate bonds, U.S. government agency bonds, municipal securities, asset-backed securities, U.S. government treasury bonds and our Israeli funds that are mainly invested in insurance policies. We obtain fair values for Level 2 investments from our asset manager for each of our portfolios. Our custody bank and asset managers independently use professional pricing services to gather pricing data which may include quoted market prices for identical or comparable financial instruments, or inputs other than quoted prices that are observable either directly or indirectly, and we are ultimately responsible for these underlying estimates.

We did not hold any Level 2 liabilities as of March 31, 2014 or December 31, 2013.

Level 3 — Unobservable inputs to the valuation methodology that are supported by little or no market activity and that are significant to the measurement of the fair value of the assets or liabilities. Level 3 assets and liabilities include those whose fair value measurements are determined using pricing models, discounted cash flow methodologies or similar valuation techniques, as well as significant management judgment or estimation.

9

We did not hold any Level 3 assets or liabilities as of March 31, 2014 or December 31, 2013.

Non-Recurring Fair Value Measurements

During the three months ended March 31, 2013, we recorded an impairment charge to our long-lived assets and goodwill of $26.3 million and $40.7 million, respectively, related to our Scanner and Services ("Scanner") reporting unit, formerly referred to as Scanner and CAD/CAM Services ("SCCS"), as an event occurred and circumstances changed that led us to perform an impairment analysis prior to our annual test which required us to determine the fair value of the Scanner reporting unit (Refer to Note 5). These fair value measurements were calculated using unobservable inputs, using the income approach which is classified as Level 3 within the fair value hierarchy. Inputs for the income approach includes the amount and timing of future cash flows based on our most recent operational budgets, strategic plans, terminal growth rates assumptions and other estimates.

Recurring Fair Value Measurements

The following table summarizes our financial assets measured at fair value on a recurring basis as of March 31, 2014 and December 31, 2013 (in thousands):

Description	Balance as of March 31, 2014		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)
Cash equivalents:
Money market funds	$	55,518	$	55,518	$	—
Commercial paper	32,995		—		32,995
Corporate bonds	2,010		—		2,010
Short-term investments:
Commercial paper	67,341		—		67,341
Corporate bonds	59,310		—		59,310
U.S. government agency bonds	22,805		—		22,805
Asset-backed securities	13,941		—		13,941
Municipal securities	9,626		—		9,626
U.S. dollar dominated foreign corporate bonds	8,108		—		8,108
U.S. government treasury bonds	2,546		—		2,546
Long-term investments:
Corporate bonds	45,836		—		45,836
U.S. government agency bonds	31,084		—		31,084
Asset-backed securities	20,501		—		20,501
U.S. government treasury bonds	20,612		20,612		—
U.S. dollar dominated foreign corporate bonds	13,768		—		13,768
Municipal securities	7,128		—		7,128
Other assets:
Israeli funds	2,274		—		2,274
	$	415,403	$	76,130	$	339,273

10

Description	Balance as of December 31, 2013		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)
Cash equivalents:
Money market funds	$	143,540	$	143,540	$	—
Commercial paper	15,398		—		15,398
Short-term investments:
Commercial paper	54,328		—		54,328
Corporate bonds	29,085		—		29,085
U.S. dollar denominated foreign corporate bonds	13,971		—		13,971
Municipal securities	7,014		—		7,014
U.S. government agency bonds	16,703		—		16,704
Asset-backed securities	5,939		—		5,938
Long-term investments:
U.S. government agency bonds	38,118		—		38,118
Corporate bonds	23,313		—		23,313
U.S. dollar denominated foreign corporate bonds	19,495		—		19,495
U.S. government treasury bonds	6,919		6,919		—
Municipal securities	8,331		—		8,331
Asset-backed securities	5,802		—		5,802
Other assets:
Israeli funds	2,193		—		2,193
	$	390,149	$	150,459	$	239,690

Note 3. Balance Sheet Components

Inventories

Inventories consist of the following (in thousands):

	March 31, 2014		December 31, 2013
Raw materials	$	5,962	$	5,172
Work in process	3,592		4,241
Finished goods	6,286		4,555
Total Inventories	$	15,840	$	13,968

Work in process includes costs to produce our clear aligner and intra-oral products. Finished goods primarily represent our intra-oral scanners and ancillary products that support our clear aligner products.

11

Accrued liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2014		December 31, 2013
Accrued payroll and benefits	$	32,400	$	43,029
Accrued sales rebates	9,851		10,100
Accrued sales tax and value added tax	6,230		6,215
Accrued sales and marketing expenses	4,689		3,893
Accrued accounts payable	5,622		4,053
Accrued warranty	3,048		3,104
Accrued professional fees	2,085		1,892
Accrued income taxes	408		1,205
Other accrued liabilities	7,016		6,854
Total Accrued Liabilities	$	71,349	$	80,345

Warranty

We regularly review the accrued warranty balances and update these balances based on historical warranty trends. Actual warranty costs incurred have not materially differed from those accrued; however, future actual warranty costs could differ from the estimated amounts.

Clear Aligner

We warrant our Invisalign products against material defects until the Invisalign case is complete. We accrue for warranty costs in cost of net revenues upon shipment of products. The amount of accrued estimated warranty costs is primarily based on historical experience as to product failures as well as current information on replacement costs.

Scanners

We warrant our scanners for a period of one year from the date of training and installation. We accrue for these warranty costs which includes materials and labor based on estimated historical repair costs. Extended service packages may be purchased for additional fees.

Warranty accrual as of March 31, 2014 and 2013 consists of the following activity (in thousands):

	Three Months Ended March 31,
	2014			2013
Balance at beginning of period	$	3,104		$	4,050
Charged to cost of net revenues	653			1,263
Actual warranty expenditures	(709		)	(1,184		)
Balance at end of period	$	3,048		$	4,129

Note 4. Business Combinations

On April 30, 2013, we completed the acquisition of ICA Holdings Pty Limited ("ICA") upon the expiration of the distribution agreement between certain subsidiaries of ICA and Align Technology B.V., for a total cash consideration of approximately $8.6 million, of which $7.4 million was attributed to assets acquired, $2.4 million in liabilities assumed and $3.6 million to goodwill. Goodwill as a result of this acquisition represents the excess of the purchase price over the fair value of the underlying net assets acquired and represents the knowledge and experience of the workforce in place. None of this goodwill will be deductible for tax purposes. Under the applicable accounting guidance, goodwill will not be amortized but will be tested for impairment on an annual basis or more frequently if certain indicators are present.  

12

We believe that the transition from our distributor arrangement to a direct sales model as a result of the acquisition of ICA will increase our net revenues in the region as we will experience higher average selling price(s) (“ASP”) as compared to our discounted ASP under the prior distribution agreement. 

Pro forma results of operations for this acquisition have not been presented as it is not material to our results of operations, either individually or in aggregate, for the three months ended March 31, 2013.

Note 5. Goodwill and Long-lived Assets

Goodwill

The change in the carrying value of goodwill for the three months ended March 31, 2014 by our reportable segments, which are also our reporting units, is as follows (in thousands):

	Clear Aligner
Balance as of December 31, 2013	$	61,623
Adjustments 1	128
Balance as of March 31, 2014	$	61,751

¹ The adjustments to goodwill during the three months ended March 31, 2014 were due to foreign currency translation.

The goodwill balance is entirely attributable to our Clear Aligner reporting unit. During the fourth quarter of fiscal 2013, we performed the annual goodwill impairment testing and found no impairment events as the fair value of our Clear Aligner reporting unit was significantly in excess of the carrying value.

Impairment of Goodwill in 2013

We evaluate our goodwill for impairment at least annually on November 30th or more frequently if indicators are present, an event occurs or circumstances change that suggest an impairment may exist and that it would more likely than not reduce the fair value of the reporting unit below its carrying amount. During March 2013, changes in the competitive environment for intra-oral scanners, including announcements from our competitors of new low-priced scanners targeted at orthodontists and general practitioner dentists in North America, that caused us to lower our expectations for growth and profitability for our Scanner reporting unit. As a result, we determined that goodwill related only to our Scanner reporting unit should be tested for impairment as of March 2013 due to these facts and circumstances which would more likely than not reduce the fair value of our Scanner reporting unit below its carrying amount. There was no triggering event related to our Clear Aligner goodwill.

We performed a step one analysis for our Scanner reporting unit which consists of a comparison of the fair value of the Scanner reporting unit against its carrying amount, including the goodwill allocated to it. In deriving the fair value of the Scanner reporting unit, we utilized the income approach which is classified as Level 3 within the fair value hierarchy. This approach provides an estimated fair value based on discounted expected future cash flows, which are based on management's estimates of revenue growth rates and operating margins, taking into consideration industry and market conditions. The discount rate used is based on a weighted average cost of capital adjusted for the relevant risk associated with the characteristics of the business and the projected cash flows.

As a result of our step one analysis, we concluded that the fair value of the Scanner reporting unit was less than its carrying value; therefore, we proceeded to step two of the goodwill impairment analysis. Step two of the goodwill impairment analysis measures the impairment charge by allocating the reporting unit's fair value to all of the assets and liabilities of the reporting unit in a hypothetical analysis that calculates the implied fair value of goodwill in the same manner as if the reporting unit was being acquired in a business combination. This allocation process was performed only for the purposes of measuring the goodwill impairment and not to adjust the carrying values of the recognized tangible assets and liabilities. Any excess of the carrying value of the reporting unit's goodwill over the implied fair value of the reporting unit's goodwill is recorded as an impairment loss. We use a discounted cash flow ("DCF") approach, utilizing the harvest model, to estimate the fair value of a reporting unit which we believe is the most reliable indicator of fair value of this business, and is most consistent with the approach a market place participant would use. Based on our analysis, there was no implied goodwill for the Scanner reporting unit; therefore, we recorded a goodwill impairment charge of $40.7 million in the three months ended March 31, 2013, which represents the remaining goodwill balance in the Scanner reporting unit. None of the goodwill impairment charge was deductible for tax purposes.

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Long-lived Assets

Impairment of Long-lived Assets in 2013

We amortize our intangible assets over their estimated useful lives. We evaluate long-lived assets, which includes property, plant and equipment and intangible assets, for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. The carrying value is not recoverable if it exceeds the undiscounted cash flows resulting from the use of the asset and its eventual disposition. Our estimates of future cash flows attributable to our long-lived assets require significant judgment based on our historical and anticipated results and are subject to many factors. Factors we consider important which could trigger an impairment review include significant negative industry or economic trends, significant loss of customers and changes in the competitive environment of our intra-oral scanning business.

During March 2013, changes in the competitive environment for intra-oral scanners, including announcements from our competitors of new low-priced scanners targeted at orthodontists and general practitioner dentists in North America, that caused us to lower our expectations for growth and profitability for our Scanner reporting unit. As a result, we determined that the carrying value of the Scanner long-lived assets was not recoverable as compared to the value of the undiscounted cash flows of our revised projections for the asset group. In order to determine the impairment amount of our long-lived assets, we fair valued each key component of our long-lived assets within the asset group, which involved the use of significant estimates and assumptions including replacement costs, revenue growth rates, operating margins, and plant and equipment cost trends. We use a DCF approach, utilizing the harvest model, to estimate the fair value of a reporting unit which we believe is the most reliable indicator of fair value of this business, and is most consistent with the approach a market place participant would use. The estimation of fair value utilizing a DCF approach includes numerous uncertainties which require our significant judgment when making assumptions of expected growth rates and the selection of discount rates, as well as assumptions regarding general economic and business conditions, and the structure that would yield the highest economic value, among other factors. Key assumptions used in measuring the fair values of the Scanner reporting unit included the discount rate (based on the weighted-average cost of capital) and revenue growth. The fair value of Scanner’s trademark was determined using a risk-adjusted DCF approach under the relief-from-royalty method. The royalty rate used was based on a consideration of market rates. The fair value of Scanner’s finite-lived customer relationships was determined using a DCF approach under the multi-period excess earnings method. We determined our long-lived asset group within the Scanner reporting unit to be primarily finite-lived intangible assets, plant and equipment. Upon completion of this analysis, we recorded a total impairment charge of $26.3 million of which $19.3 million represented the impairment related to our Scanner intangible assets and $7.0 million related to plant and equipment. There was no triggering event related to the Clear Aligner asset group.

Intangible assets arising either as a direct result from the Cadent acquisition or individually acquired are being amortized as follows (in thousands):

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of March 31, 2014		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of March 31, 2014
Trademarks	15	$	7,100	$	(1,249	)	$	(4,179	)	$	1,672
Existing technology	13	12,600		(2,591		)	(4,328		)	5,681
Customer relationships	11	33,500		(7,701		)	(10,751		)	15,048
Other	8	285		(49		)	—			236
Total Intangible Assets		$	53,485	$	(11,590	)	$	(19,258	)	$	22,637

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2013		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of December 31, 2013
Trademarks	15	$	7,100	$	(1,100	)	(4,179		)	$	1,821
Existing technology	13	12,600		(2,236		)	(4,328		)	6,036
Customer relationships	11	33,500		(7,112		)	(10,751		)	15,637
Other	8	285		(40		)	—			245
Total Intangible Assets		$	53,485	$	(10,488	)	$	(19,258	)	$	23,739

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The total estimated annual future amortization expense for these acquired intangible assets as of March 31, 2014 is as follows (in thousands):

Fiscal Year Ending December 31,
Remainder of 2014	$	1,951
2015	2,600
2016	2,600
2017	2,600
2018	2,600
Thereafter	10,286
Total	$	22,637

Note 6. Credit Facilities

On March 22, 2013, we entered into a credit facility with Wells Fargo Bank. The credit facility provides for a $50.0 million revolving line of credit, with a $10.0 million letter of credit sublimit, and has a maturity date on March 22, 2016. The credit facility also requires us to maintain a minimum unrestricted cash balance of $50.0 million and comply with specific financial conditions and performance requirements. The loans bear interest, at our option, at a fluctuating rate per annum equal to the daily one-month adjusted LIBOR rate plus a spread of 1.75% or an adjusted LIBOR rate (based on one, three, six or twelve-month interest periods) plus a spread of 1.75%. As of March 31, 2014, we had no outstanding borrowings under this credit facility and were in compliance with the conditions and performance requirements.

Note 7. Legal Proceedings

Securities Class Action Lawsuit

On November 28, 2012, plaintiff City of Dearborn Heights Act 345 Police & Fire Retirement System filed a lawsuit against Align, Thomas M. Prescott (“Mr. Prescott”), Align's President and Chief Executive Officer, and Kenneth B. Arola (“Mr. Arola”), Align's former Vice President, Finance and Chief Financial Officer, in the United States District Court for the Northern District of California on behalf of a purported class of purchasers of our common stock (the "Securities Action"). On July 11, 2013, an amended complaint was filed, which named the same defendants, on behalf of a purported class of purchasers of our common stock between January 31, 2012 and October 17, 2012. The amended complaint alleged that Align, Mr. Prescott and Mr. Arola violated Section 10(b) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder, and that Mr. Prescott and Mr. Arola violated Section 20(a) of the Securities Exchange Act of 1934. Specifically, the amended complaint alleged that during the purported class period defendants failed to take an appropriate goodwill impairment charge related to the April 29, 2011 acquisition of Cadent Holdings, Inc. in the fourth quarter of 2011, the first quarter of 2012 or the second quarter of 2012, which rendered our financial statements and projections of future earnings materially false and misleading and in violation of U.S. GAAP. The amended complaint sought monetary damages in an unspecified amount, costs and attorney's fees. On December 9, 2013, the court granted defendant's motion to dismiss with leave for plaintiff to file a second amended complaint. Plaintiff filed a second amended complaint on January 8, 2014 on behalf of the same purported class. The second amended complaint states the same claims as the first amended complaint. We filed a motion to dismiss the second amended complaint on February 7, 2014. Align intends to vigorously defend itself against these allegations. Align is currently unable to predict the outcome of this amended complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.

Shareholder Derivative Lawsuit

On February 1, 2013, plaintiff Gary Udis filed a shareholder derivative lawsuit against several of Align's current and former officers and directors in the Superior Court of California, County of Santa Clara. The complaint alleges that our reported income and earnings were materially overstated because of a failure to timely write down goodwill related to the April 29, 2011 acquisition of Cadent Holdings, Inc., and that defendants made allegedly false statements concerning our forecasts. The complaint asserts various state law causes of action, including claims of breach of fiduciary duty, unjust enrichment, and insider trading, among others. The complaint seeks unspecified damages on behalf of Align, which is named solely as nominal defendant against whom no recovery is sought. The complaint also seeks an order directing Align to reform and improve its

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corporate governance and internal procedures, and seeks restitution in an unspecified amount, costs, and attorney's fees. On July 8, 2013, an Order was entered staying this derivative lawsuit until an initial ruling on our first motion to dismiss the Securities Action. On January 15, 2014, an Order was entered staying this derivative lawsuit until an initial ruling on our second motion to dismiss the Securities Action discussed above. Align intends to vigorously defend itself against these allegations. Align is currently unable to predict the outcome of this complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible losses.

In addition, in the course of Align's operations, Align is involved in a variety of claims, suits, investigations, and proceedings, including actions with respect to intellectual property claims, patent infringement claims, government investigations, labor and employment claims, breach of contract claims, tax, and other matters. Regardless of the outcome, these proceedings can have an adverse impact on us because of defense costs, diversion of management resources, and other factors. Although the results of complex legal proceedings are difficult to predict and Align's view of these matters may change in the future as litigation and events related thereto unfold; Align currently does not believe that these matters, individually or in the aggregate, will materially affect Align's financial position, results of operations or cash flows.

Note 8. Commitments and Contingencies

Operating Leases

As of March 31, 2014, minimum future lease payments for non-cancelable operating leases are as follows (in thousands):

Fiscal Year Ending December 31,	Operating leases
Remainder of 2014	$	6,960
2015	8,437
2016	7,717
2017	4,413
2018	1,539
Thereafter	500
Total minimum future lease payments	$	29,566

Off-balance Sheet Arrangements

As of March 31, 2014, we had no off-balance sheet arrangements that have, or are reasonably likely to have, a current or future material effect on our consolidated financial condition, results of operations, liquidity, capital expenditures or capital resources.

Indemnification Provisions

In the normal course of business to facilitate transactions in our services and products, we indemnify certain parties: customers, vendors, lessors and other parties with respect to certain matters, including, but not limited to, services to be provided by us and intellectual property infringement claims made by third parties. In addition, we have entered into indemnification agreements with our directors and our executive officers that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. Several of these agreements limit the time within which an indemnification claim can be made and the amount of the claim.

It is not possible to make a reasonable estimate of the maximum potential amount under these indemnification agreements due to the unique facts and circumstances involved in each particular agreement. Additionally, we have a limited history of prior indemnification claims and the payments we have made under such agreements have not had a material adverse effect on our results of operations, cash flows or financial position. However, to the extent that valid indemnification claims arise in the future, future payments by us could be significant and could have a material adverse effect on our results of operations or cash flows in a particular period. As of March 31, 2014, we did not have any material indemnification claims that were probable or reasonably possible.

Note 9. Stock-based Compensation

Summary of stock-based compensation expense

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As of March 31, 2014, we had a total reserve of 23,283,379 shares for issuance, plus up to an aggregate of 5,000,000 shares that would have been returned to our 2001 Stock Incentive Plan as a result of termination of options on or after March 28, 2005.

Stock-based compensation is based on the estimated fair value of awards, net of estimated forfeitures, and recognized over the requisite service period. Estimated forfeitures are based on historical experience at the time of grant and may be revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The stock-based compensation related to all of our stock-based awards and employee stock purchases for the three months ended March 31, 2014 and 2013 is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Cost of net revenues	$	844	$	580
Sales and marketing	2,667		1,011
General and administrative	4,050		3,927
Research and development	1,571		892
Total stock-based compensation	$	9,132	$	6,410

Options

Activity for the three month period ended March 31, 2014 under the stock option plans is set forth below (in thousands, except years and per share amounts):

	Stock Options Number of Shares Underlying Stock Options		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
					(in years )
Outstanding as of December 31, 2013	1,321
Granted	—
Exercised	(472	)
Cancelled or expired	(1	)
Outstanding as of March 31, 2014	848		$	15.47	3.56	$	30,814
Vested and expected to vest at March 31, 2014	846		$	15.46	3.56	$	30,755
Exercisable at March 31, 2014	783		$	14.96	3.53	$	28,857

There were no stock options granted during the three months ended March 31, 2014 and 2013.

As of March 31, 2014, the total unamortized compensation cost related to stock options, net of estimated forfeitures, is $0.6 million, which we expect to recognize over a weighted average period of 1.0 year.

Restricted Stock Units (“RSU”)

A summary of the RSU activity for the three months ended March 31, 2014 is as follows (in thousands, except years):

	Number of Shares Underlying RSU		Weighted Remaining Vesting Period	Aggregate Intrinsic Value
			(in years)
Nonvested as of December 31, 2013	2,044
Granted	894
Vested and released	(470	)
Forfeited	(49	)
Nonvested as of March 31, 2014	2,419		1.89	$	125,272

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As of March 31, 2014, the total unamortized compensation cost related to RSU, net of estimated forfeitures, was $81.7 million, which we expect to recognize over a weighted average period of 2.9 years.

We have granted market-performance based restricted stock units (“MSU”) to our executive officers. Each MSU represents the right to one share of Align’s common stock and will be issued through our amended 2005 Incentive Plan. The actual number of MSU which will be eligible to vest will be based on the performance of Align’s stock price relative to the performance of the NASDAQ Composite Index over the vesting period, generally two to three years, up to 150% of the MSU initially granted.

The following table summarizes the MSU activity for the three months ended March 31, 2014 (in thousands, except years):

	Number of Shares Underlying MSU		Weighted Average Remaining Vesting Period	Aggregate Intrinsic Value
			(in years )
Nonvested as of December 31, 2013	307
Granted	243
Vested and released	(53	)
Forfeited	—
Nonvested as of March 31, 2014	497		2.13	$	25,766

As of March 31, 2014, the total unamortized compensation costs related to the MSU, net of estimated forfeitures, was $14.1 million, which we expect to recognize over a weighted average period of 2.1 years.

Employee Stock Purchase Plan ("ESPP")

In May 2010, our stockholders approved the 2010 Employee Stock Purchase Plan ("2010 Purchase Plan") which will continue until terminated by either the Board of Directors or its administrator. The maximum number of shares available for purchase under the 2010 Purchase Plan is 2,400,000 shares. As of March 31, 2014, there remains 1,475,372 shares available for purchase under the 2010 Purchase Plan.

The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:

	Three Months Ended March 31,
	2014			2013
Employee Stock Purchase Plan:
Expected term (in years)	1.2			1.2
Expected volatility	42.3		%	46.7		%
Risk-free interest rate	0.2		%	0.2		%
Expected dividends	—			—
Weighted average fair value at grant date	$	17.97		$	11.17

As of March 31, 2014, the total unamortized compensation cost related to employee purchases we expect to recognize was $2.1 million over a weighted average period of 0.7 year.

Note 10. Accounting for Income Taxes

Our provision for income taxes was $10.0 million and $2.9 million for the three months ended March 31, 2014 and 2013, respectively. This represents effective tax rates of 23.5% and (7.5)%, respectively. The increase in provision for income taxes was primarily due to higher pre-tax income, which was partially offset by a jurisdictional shift in forecasted earnings from the U.S. to lower-tax non-U.S. jurisdictions. The effective tax rate for the three months ended March 31, 2013 reflects a non-deductible goodwill impairment charge of $40.7 million.

We exercise significant judgment in regards to estimates of future market growth, forecasted earnings and projected taxable income in determining the provision for income taxes, and for purposes of assessing our ability to utilize any future benefit from deferred tax assets.

As of March 31, 2014, we maintained a valuation allowance of $35.4 million against deferred tax assets primarily related to foreign net operating loss carryforwards and capital loss carryforwards. These net operating and capital loss carryforwards would result in an income tax benefit if we were to conclude it is more likely than not that the related deferred tax assets will be realized.

During the three months ended March 31, 2014, the change in our gross unrecognized tax benefits was not material. The total amount of gross unrecognized tax benefits was $27.9 million as of March 31, 2014, all of which would impact our effective tax rate if recognized. We have elected to recognize interest and penalties related to unrecognized tax benefits as a component of income taxes. The change in accrued interest and penalties during the three months ended March 31, 2014, was not material. We do not expect any significant changes to the amount of unrecognized tax benefit within the next twelve months.

During the first quarter of 2014, we adopted ASU 2013-11, "Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force)." The adoption of this standard had the effect of reducing our accruals for uncertain tax positions by $8.4 million, with an offsetting reduction in our long term deferred tax assets, but had no effect on net income.

We are subject to taxation in the U.S. and various states and foreign jurisdictions. All of our tax years will be open to examination by the U.S. federal and most state tax authorities due to our net operating loss and overall credit carryforward position. With few exceptions, we are no longer subject to examination by foreign tax authorities for years before 2006.

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In June 2009, the Costa Rica Ministry of Foreign Trade, an agency of the Government of Costa Rica, granted a twelve year extension of certain income tax incentives, which were previously granted in 2002. The incentive tax rates will expire in various years beginning in 2017. Under these incentives, all of the income in Costa Rica during these twelve year incentive periods is subject to reduced rate of Costa Rica income tax. In order to receive the benefit of these incentives, we must hire specified numbers of employees and maintain certain minimum levels of fixed asset investment in Costa Rica. If we do not fulfill these conditions for any reason, our incentive could lapse, and our income in Costa Rica would be subject to taxation at higher rates. The Costa Rica corporate income tax rate that would apply, absent the incentives, is 30% for 2014. As a result of these incentives, income taxes were reduced by $7.6 million and $6.0 million for the three months ended March 31, 2014 and 2013, respectively, representing a benefit to diluted net income per share of $0.09 and $0.07 in 2014 and 2013, respectively.

Note 11. Net Income (Loss) Per Share

Basic net income (loss) per share is computed using the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed using the weighted average number of shares of common stock, adjusted for the dilutive effect of potential common stock. Potential common stock, computed using the treasury stock method, includes stock options, RSU, MSU and ESPP.

The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stock (in thousands, except per share amounts):

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	Three Months Ended, March 31
	2014		2013
Numerator:
Net income (loss)	$	32,444	$	(41,983	)
Denominator:
Weighted-average common shares outstanding, basic	81,120		81,248
Dilutive effect of potential common stock	1,697		—
Total shares, diluted	82,817		81,248
Net income (loss) per share, basic	$	0.40	$	(0.52	)
Net income (loss) per share, diluted	$	0.39	$	(0.52	)

For the three months ended March 31, 2014, the anti-dilutive affect from stock options, RSU, MSU and ESPP was not material.

For the three months ended March 31, 2013, stock options, RSU, MSU and ESPP totaling 1.8 million of potentially dilutive shares have been excluded from the total diluted shares because there was a net loss during the period.

Note 12. Segments and Geographical Information

Segment Information

Operating segments are defined as components of an enterprise for which separate financial information is available that is evaluated regularly by the Chief Operating Decision Maker (“CODM”), or decision-making group, in deciding how to allocate resources and in assessing performance. Our CODM is our Chief Executive Officer. We report segment information based on the management approach. The management approach designates the internal reporting used by CODM for decision making and performance assessment as the basis for determining our reportable segments. The performance measures of our reportable segments include net revenues and gross profit.

We have grouped our operations into two reportable segments which are also our reporting units: Clear Aligner segment and Scanner segment.

• Our Clear Aligner segment consists of our Invisalign system which includes Invisalign Full, Express/Lite, Teen, Assist, Vivera retainers, along with our training and ancillary products for treating malocclusion.

• Our Scanner segment consists of intra-oral scanning systems and additional services available with the intra-oral scanners that provide digital alternatives to the traditional cast models. This segment includes our iTero scanner and OrthoCAD services.

These reportable operating segments are based on how our CODM views and evaluates our operations as well as allocation of resources (in thousands):

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	For the Three Months Ended March 31,
Net Revenues	2014		2013
Clear Aligner
Invisalign Full Products	$	138,133	$	112,780
Invisalign Express/Lite Products	19,625		16,083
Invisalign non-case revenues	10,481		12,709
Scanner
Scanners and Services	12,407		12,008
Total net revenues	$	180,646	$	153,580
Gross profit
Clear Aligner	$	133,083	$	109,327
Scanners and Services	4,168		3,522
Total gross profit	$	137,251	$	112,849

Geographical Information

Net revenues and tangible long-lived assets are presented below by geographic area (in thousands):

	For the Three Months Ended March 31,
	2014		2013
Net revenues: (1)
U.S.	$	128,640	$	119,840
the Netherlands	38,843		26,947
Other international	13,163		6,793
Total net revenues	$	180,646	$	153,580

⁽¹⁾ Net revenues are attributed to countries based on location of where revenue is recognized.

	March 31,		December 31,
	2014		2013
Long-lived assets:(2)
United States	$	65,141	$	61,439
Mexico	6,272		6,291
the Netherlands	1,492		1,630
Other International	6,188		6,383
Total long-lived assets	$	79,093	$	75,743

⁽²⁾ Long-lived assets are attributed to countries based on entity that owns the asset.

Note 13. Subsequent Events

On April 23, 2014, we announced that our Board of Directors had authorized a stock repurchase program pursuant to which we may purchase up to $300.0 million of our common stock over the next three years, with $100.0 million of that amount authorized to be purchased over the next twelve months. Any purchases under this stock repurchase program may be made, from time-to-time, pursuant to open market purchases (including pursuant to Rule 10b5-1 plans), privately-negotiated transactions, accelerated stock repurchases, block trades or derivative contracts or otherwise in accordance with applicable federal securities laws, including Rule 10b-18 of the Securities Exchange Act of 1934.

As part of our $300.0 million stock repurchase program, we entered into an accelerated share repurchase agreement ("ASR") with Goldman, Sachs & Co. on April 28, 2014 to repurchase $70.0 million of our common stock. Under the terms of

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the ASR, we agreed to repurchase in total $70.0 million of our common stock, with an initial delivery of approximately 1.0 million shares based on current market prices. The final number of shares to be repurchased will be based on our volume-weighted average stock price during the term of the transaction, less an agreed upon discount. The ASR is expected to be completed by July 29, 2014.

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ITEM 2.MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

In addition to historical information, this quarterly report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. These statements include, among other things, our expectations regarding the anticipated impact that our new products and product enhancements will have on doctor utilization and our market share, our expectations regarding product mix and product adoption, our expectations regarding the existence and impact of seasonality, our expectations regarding the financial and strategic benefits of the scanner and services business, our expectations to increase our investment in manufacturing capacity, our expectations regarding the continued expansion of our international markets, the anticipated number of new doctors trained and their impact on volumes, the impact of the termination of our Asia Pacific distributor relationship and reverting to a direct sales model in that region by acquiring the distributor business, our expectations regarding our stock repurchase program, the level of our operating expenses and gross margins, and other factors beyond our control, as well as other statements regarding our future operations, financial condition and prospects and business strategies. These statements may contain words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “estimates,” or other words indicating future results. These forward-looking statements are subject to certain risks and uncertainties that could cause actual results to differ materially from those reflected in the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations”, and in particular, the risks discussed below in Part II, Item 1A “Risk Factors”. We undertake no obligation to revise or update these forward-looking statements. Given these risks and uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements.

The following discussion and analysis of our financial condition and results of operations should be read together with our Condensed Consolidated Financial Statements and related notes included elsewhere in this Quarterly Report on Form 10-Q.

Overview

Align Technology, Inc. is a global medical device company that advanced the invisible orthodontics market with the introduction of the Invisalign System in 1999. Today, we are focused on designing, manufacturing and marketing innovative technology-rich products to help dental professionals achieve the clinical results they expect and deliver effective, convenient cutting-edge dental treatment options to their patients. Align Technology was founded in March 1997 and is headquartered in San Jose, California with offices worldwide. Our international headquarters are located in Amsterdam, the Netherlands. We have two operating segments: (1) Clear Aligner, known as the Invisalign System; and (2) Scanner and Services ("Scanner"), known as the iTero intra-oral scanners and OrthoCAD services (which we previously referred to as Scanner and CAD/CAM Services ("SCCS")).

We received FDA clearance in 1998 and began our first commercial sales of Invisalign to U.S. orthodontists in 1999 followed by U.S. General Practitioner Dentists (GPs) in 2002. Over the next decade, we introduced Invisalign to the European market and Japan, added distribution partners in Asia-Pacific, Latin America, and EMEA, and introduced a full range of treatment options including Invisalign Express 10, Invisalign Teen, Invisalign Assist, and Vivera Retainers. By 2011, we launched significant new aligner and software features across all Invisalign products that make it easier for doctors to use Invisalign on more complex cases, and introduced Invisalign to the People’s Republic of China. In 2013, we launched SmartTrack, the next generation of Invisalign clear aligner material, which became the new standard aligner material for Invisalign products in North America, Europe and other international markets where we have obtained regulatory approval. Most recently, in February 2014, we launched Invisalign G5 innovations, specifically designed for treatment of deep bite malocclusion as well as ClinCheck Pro, the next generation Invisalign treatment software tool, designed to help Invisalign providers achieve their treatment goals.

We also sell iTero intra-oral scanners and provide computer-aided design and computer-aided manufacturing ("CAD/CAM") services. Intra-oral scanners provide a dental “chair-side” platform for accessing valuable digital diagnosis and treatment tools, with potential for enhancing accuracy of records, treatment efficiency, and the overall patient experience. We believe there are numerous benefits for customers and the opportunity to accelerate the adoption of Invisalign through interoperability with our intra-oral scanners. The use of digital technologies such as CAD/CAM for restorative dentistry or in-office restorations has been growing rapidly and intra-oral scanning is a critical part of enabling these new digital technologies and procedures in dental practices. In late 2012, we commercially launched the Invisalign Outcome Simulator, the first Invisalign chair-side application powered by the iTero scanner. The interactive application provides dentists and orthodontists an enhanced platform for patient education and is designed to increase treatment acceptance by helping patients visualize the benefits possible with Invisalign treatment. In January 2014, we announced that the 3M™ True Definition scanner was qualified for use with Invisalign case submissions. This qualification enables Invisalign providers with a True Definition

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scanner to submit a digital impression in place of a traditional PVS impression as part of the Invisalign case submission process. The 3M True Definition scanner is currently the only third-party scanner that has been qualified for use with Invisalign treatment. We continue to believe in an open systems approach to digital impressions, and are committed to working with other intra-oral scanning companies interested in developing interoperability for use with Invisalign treatment.

The Invisalign System is offered in more than 60 countries and has been used to treat more than 2.5 million patients. Our iTero intra-oral scanner, which is primarily sold in North America, provides dental professionals with an open choice to send digital impressions to any laboratory-based CAD/CAM system or to any of the more than 1,200 dental labs worldwide.

Our goal is to establish Invisalign clear aligners as the standard method for treating malocclusion and to establish the iTero intra-oral scanner as the preferred scanning device for 3D digital scans, ultimately driving increased product adoption by dental professionals. We intend to achieve this by continued focus and execution of our strategic growth drivers set forth in the Business Strategy section in our Annual Report on Form 10-K.

The successful execution of our business strategy and our results in 2014 and beyond may be affected by a number of other factors, which are updated below:

• New Products, Feature Enhancements and Technology Innovation.  Product innovation drives greater treatment predictability and clinical applicability, and ease of use for our customers, which supports adoption of Invisalign in their practices. Increasing applicability and treating more complex cases requires that we move away from individual features to comprehensive solutions so that Invisalign providers can more predictably treat the whole case, such as with Invisalign G5 for deep bite treatment. Launched in February 2014, Invisalign G5 was engineered to treat deep bite malocclusion in its entirety, making it easier for our customers to treat one of the most common malocclusions. In North America, in February 2014, we also launched ClinCheck Pro, the next generation Invisalign treatment software tool, designed to provide more precise control over final tooth position and to help Invisalign providers achieve their treatment goals. We intend to launch ClinCheck Pro in our other country markets in the first quarter of 2015. We believe that over the long-term, clinical solutions and treatment tools will increase adoption of Invisalign; however, it is difficult to predict the rate of adoption which may vary by region and channel.

• Invisalign Utilization rates.  Our goal is to establish Invisalign as the treatment of choice for treating malocclusion ultimately driving increased product adoption and frequency of use by dental professionals, also known as "utilization rates". Our quarterly utilization rates for the previous 9 quarters are as follows:

^*    Invisalign Utilization rates = # of cases shipped divided by # of doctors cases were shipped to

Total utilization in the first quarter of 2014 was 4.3 cases per doctor and was flat compared to the first quarter of 2013. Utilization among our North American orthodontist customers increased slightly to 8.1 case per doctor in the first quarter of 2014 from 8.0 in the first quarter of 2013, while our International doctor utilization increased to 4.3 in the first quarter of 2014 from 4.0 in the first quarter of 2013. This increase in North America orthodontist

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utilization reflects improvements in product and technology over the past year, including Invisalign G5, which continues to strengthen our doctors’ clinical confidence in the use of Invisalign such that they now utilize Invisalign more often and on more complex cases. Increased International utilization reflects strong growth in both the Europe Middle East and Africa ("EMEA") and Asia Pacific regions driven by go to market and sales coverage investments, improving clinical education and support as well as the introduction of new products such as Invisalign G5. Year over year utilization for our North American GP customers was relatively unchanged. Although we expect that over the long-term our utilization rates will gradually improve, we expect that period over period comparisons of our utilization rates will fluctuate.

• Number of new Invisalign doctors trained.  We continue to expand our Invisalign customer base through the training of new doctors. In 2013, Invisalign growth was driven primarily by increased utilization by our orthodontist customers as well as by the continued expansion of our customer base as we trained a total of 8,065 new Invisalign doctors. GPs are one of the keys to driving growth in the adult segment and, in 2014, we launched a new CE I training course, now called Invisalign Fundamentals, designed to improve practice integration and increase utilization for newly trained doctors. We are implementing this new Invisalign Fundamentals program across North America and will look for opportunities to adjust our international training programs as we work to help our GP practices worldwide more successfully adopt Invisalign into their practices. We believe that this new training approach will increase the number of doctors submitting cases 90-days post-training, as well as the number of cases submitted per doctor.

• International Clear Aligner. We will continue to focus our efforts towards increasing adoption of our products by dental professionals in our direct international markets. On a year over year basis, international volume increased 25%, driven primarily by growth in Europe as well as by strong performance in the Asia Pacific region. In 2014, we will continue to expand in our existing markets through targeted investments in sales coverage and professional marketing and education programs, along with consumer marketing in selected country markets. In addition, given the significant long term potential this extensive geography represents and the support we can now provide by utilizing our direct coverage model in Europe, beginning in February 2014, we transitioned a small number of these countries into direct sales regions. We expect to leverage our existing infrastructure and resources to bring sales coverage and customer support to these countries, most of which are adjacent to our directly covered European countries. Due to the small volume of business from our EMEA distributor, we do not anticipate that this transition will have a material effect on our financial results in the next several years. 

• Foreign exchange rates. Although the U.S. dollar is our reporting currency, a portion of our net revenues and income are generated in foreign currencies. Net revenues and income generated by subsidiaries operating outside of the U.S. are translated into U.S. dollars using exchange rates effective during the respective period and as a result are affected by changes in exchange rates. We have generally accepted the exposure to exchange rate movements without using derivative financial instruments to manage this risk; therefore, both positive and negative movements in currency exchange rates against the U.S. dollar will continue to affect the reported amount of net revenues and income in our consolidated financial statements.

• Medical Device Excise Tax. During March 2014, Align had extensive discussions with the IRS and they informed us that our aligners are not subject to the medical device excise tax ("MDET") which we had been paying and expensing in general and administrative expenses in the consolidated statements of operations since January 1, 2013. As a result of these discussions, beginning in March 2014, we ceased expensing and paying the MDET for aligners, which reduced our first quarter general and administrative expense by approximately $0.5 million. In future quarters, we expect our general and administrative expense in relation to MDET to decrease by approximately $1.8 million per quarter based on current revenues. Additionally, we are in process of claiming a $8.0 million refund of MDET paid in 2013 and 2014; however, because this claim is subject to review and approval by the IRS, we have not recorded a receivable as the outcome of our audit is uncertain. Any future changes in the applicability of the MDET as it applies to us or refunds of amounts previously paid will be recorded as an additional expense or a credit to the consolidated statement of operations in the period in which is becomes probable and reasonably estimable.

• Stock Repurchase Authorization. On April 23, 2014, we announced that our Board of Directors had authorized a stock repurchase program pursuant to which we may purchase up to $300.0 million of our common stock over the next three years, with $100.0 million of that amount authorized to be purchased over the next twelve months. Any purchases under this stock repurchase program may be made, from time-to-time, pursuant to open market purchases (including pursuant to Rule 10b5-1 plans), privately-negotiated transactions, accelerated stock repurchases, block trades or derivative contracts or otherwise in accordance with applicable federal securities

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laws, including Rule 10b-18 of the Securities Exchange Act of 1934. The program does not obligate Align to acquire any particular amount of common stock and depending on market conditions or other factors these purchases may be commenced or suspended at any time, or from time-to-time without prior notice. The authorization or continuance of any repurchases under stock repurchase programs is contingent on a variety of factors, including our financial condition, results of operations, business requirements, and our Board of Directors' continuing determination that such stock repurchases are in the best interests of our stockholders and in compliance with all laws and applicable agreements. Additionally, there can be no assurance that our stock repurchase program will have a beneficial impact on our stock price.

• Accelerated Stock Repurchase Agreement. As part of our $300.0 million stock repurchase program, we entered into an accelerated share repurchase agreement ("ASR") with Goldman, Sachs & Co. on April 28, 2014 to repurchase $70.0 million of our common stock. Under the terms of the ASR, we agreed to repurchase in total $70.0 million of our common stock, with an initial delivery of approximately 1.0 million shares based on current market prices. The final number of shares to be repurchased will be based on our volume-weighted average stock price during the term of the transaction, less an agreed upon discount. We expect to finance the ASR with current cash on hand and for it to be completed by July 29, 2014.

• Balance Sheet Reclassification. Subsequent to the furnishing of our Results of Operations and Financial Conditions on Form 8-K with the SEC on April 23, 2014, we recorded an adjustment to reclassify $2.0 million from long-term marketable securities to short-term marketable securities in our condensed consolidated balance sheet presented in this Form 10-Q. This reclassification was not considered to be material and did not have an impact to our condensed consolidated statement of cash flow or operations for the three months ended March 31, 2014.

Results of Operations

Net revenues by Reportable Segment

We group our operations into two reportable segments: Clear Aligner segment and Scanner segment.

• Our Clear Aligner segment consists of our Invisalign system which includes Invisalign Full, Teen and Assist ("Full Products"), Express/Lite ("Express Products"),Vivera retainers, along with our training and ancillary products for treating malocclusion.

• Our Scanner segment consists of intra-oral scanning systems and additional services available with the intra-oral scanners that provide digital alternatives to the traditional cast models. This segment includes our iTero scanner and OrthoCAD services.

The below represents net revenues for our Clear Aligner segment by region and product and our Scanner segment by region for the three months ended March 31, 2014 and 2013 as follows (in millions):

	Three Months Ended March 31,
Clear Aligner:	2014		2013		Net Change			% Change
Region
North America	107.9		97.1		10.8			11.1	%
International	49.8		31.8		18.0			56.6	%
Invisalign non-case net revenues	10.5		12.7		(2.2		)	(17.3	)%
Total Clear Aligner net revenues	$	168.2	$	141.6	$	26.6		18.8	%
Product
Invisalign Full Products	$	138.1	$	112.8	$	25.3		22.4	%
Invisalign Express Products	19.6		16.1		3.5			21.7	%
Invisalign non-case net revenues	10.5		12.7		(2.2		)	(17.3	)%
Total Clear Aligner net revenues	$	168.2	$	141.6	$	26.6		18.8	%
Scanner:
Region
North America	$	12.3	$	11.5	$	0.8		7.0	%
International	0.1		0.5		(0.4		)	(80.0	)%
Total Scanner net revenues	$	12.4	$	12.0	$	0.4		3.3	%
Total net revenues	$	180.6	$	153.6	$	27.0		17.6	%

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Clear Aligner Case Volume by Channel and Product

Case volume data which represents Invisalign case shipments by region and product, for the three months ended March 31, 2014 and 2013 is as follows (in thousands):

	Three Months Ended March 31,
Region	2014	2013	Net Change	% Change
North American Invisalign	81.4	74.7	6.7	9.0	%
International Invisalign	30.8	23.5	7.3	31.1	%
Total Invisalign case volume	112.2	98.2	14.0	14.3	%
Product
Invisalign Full Product Group	92.3	79.3	13.0	16.4	%
Invisalign Express Product Group	19.8	18.9	0.9	4.8	%
Total Invisalign case volume	112.1	98.2	13.9	14.2	%

Total net revenues increased by $27.0 million for the three months ended March 31, 2014, as compared to the same period in 2013 primarily as a result of Invisalign case volume growth across all regions and most products.

Clear Aligner

In the three months ended March 31, 2014, Clear Aligner North America net revenues increased by $10.8 million or 11.1% compared to the same period in 2013 primarily due to Invisalign case volume growth of approximately $8.7 million across all channels and most products and, to a lesser extent, higher average selling prices ("ASP") which contributed approximately $2.1 million to the increase in net revenues. The increase in ASP was primarily a result of lower promotional discounts in the current period compared to the same period in the prior year.

In the three months ended March 31, 2014, Clear Aligner international net revenues increased by $18.0 million or 56.6% compared to the same period in 2013 primarily driven by Invisalign case volume growth of $9.9 million across all products and higher ASP which contributed approximately $8.1 million to the increase in net revenues. The increase in ASP was primarily due to the impact from acquiring our distributor in the Asia Pacific region on April 30, 2013, as we now recognize direct sales of Invisalign products sold in that region at our full ASP rather than the discounted ASP under the distributor agreement, as well as price increases which were effective July 2013 along with a favorable impact from foreign exchange rates.

Invisalign non-case net revenues, consisting of training fees and ancillary product revenues, decreased $2.2 million or17.3% for the three months ended March 31, 2014 compared to the same periods in 2013 primarily due to the consolidation of our Vivera product shipments in North America. In the first quarter of 2013, we began consolidating Vivera shipments into one shipment per year rather than four shipments per year. As a result, net revenues for the three months ended March 31, 2013 reflected a benefit of approximately $4.4 million as we recognized nine additional months of the subscription revenue in the first quarter instead of recognizing it ratably every quarter for one year. This decrease was offset in part by increased Vivera volume both in North America and international regions.

Scanner and Services

Scanner and Services net revenues increased $0.4 million or 3.3% for the three months ended March 31, 2014 compared to the same period in 2013 primarily due to an increase in the volume of services resulting from a larger installed base of scanner partially offset by a decrease in scanner revenue primarily due to lower scanner ASP as a result of promotional discounts as well as permanent price reductions. Additionally, net revenues for the three months ended March 31, 2013 included a release of $1.4 million of revenue previously reserved for the new iTero upgrade program which was completed in the first quarter of 2013.

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Cost of net revenues and gross profit (in millions):

	Three Months Ended March 31,
	2014			2013			Change
Clear Aligner
Cost of net revenues	$	35.2		$	32.2		$	3.0
% of net segment revenues	20.9		%	22.8		%
Gross profit	$	133.1		$	109.3		$	23.8
Gross margin %	79.1		%	77.2		%
Scanner
Cost of net revenues	$	8.2		$	8.5		$	(0.3	)
% of net segment revenues	66.4		%	70.7		%
Gross profit	$	4.2		$	3.5		$	0.7
Gross margin %	33.6		%	29.3		%
Total cost of net revenues	$	43.4		$	40.7		$	2.7
% of net revenues	24.0		%	26.5		%
Gross profit	$	137.3		$	112.9		$	24.4
Gross margin %	76.0		%	73.5		%

Cost of net revenues for our Clear Aligner and Scanner segments includes salaries for staff involved in the production process, the cost of materials, packaging, shipping costs, depreciation on capital equipment used in the production process, amortization of acquired intangible assets from Cadent, training costs and stock-based compensation.

Clear Aligner

Gross margin increased for the three months ended March 31, 2014 compared to the same period in 2013 due to higher ASP along with lower inventory reserves in comparison to the prior year period when we transitioned to our new SmartTrack material in February 2013. In addition, we experienced lower warranty costs as a result of reduced claims corresponding with the change in our mid-course correction policy in June 2013.

Scanner

Gross margin increased for the three months ended March 31, 2014 compared to the same period in 2013 due to increased absorption of manufacturing spend from higher production volumes, reduced freight costs and lower inventory reserves. These improvements were partially offset by the benefit in the prior year period which included a release of $1.4 million of revenue previously reserved for the new iTero upgrade program along with lower ASPs in the current year due to price reductions.

Sales and marketing (in millions):

	Three Months Ended March 31,
	2014			2013			Change
Sales and marketing	$	52.9		$	42.3		$	10.6
% of net revenues	29.3		%	27.5		%

Sales and marketing expense includes sales force and marketing compensation (including travel-related costs), media and advertising, clinical education, trade shows and industry events, product marketing, stock-based compensation and allocations of corporate overhead expenses including facilities, IT and human resources.

Our sales and marketing expense for the three months ended March 31, 2014 increased compared to the same period in 2013 primarily due to higher compensation related costs of $7.6 million from increased headcount, including additional employees as a result of the acquisition of our APAC distributor in April 2013, higher salaries as a result of our annual focal review and higher stock-based compensation. In addition, advertising and media costs increased by approximately $2.1 million related to network and television media campaigns.

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General and administrative (in millions):

	Three Months Ended March 31,
	2014			2013			Change
General and administrative	$	29.2		$	30.3		$	(1.1	)
% of net revenues	16.2		%	19.8		%

General and administrative expense primarily includes administrative personnel compensation costs including stock-based compensation, outside consulting services, legal expenses, depreciation and amortization expense, the medical device excise tax ("MDET") and allocations of corporate overhead expenses including facilities, IT and human resources.

General and administrative expense decreased for the three months ended March 31, 2014 compared to the same period in 2013 primarily due to lower outside litigation costs and decreased compensation costs as a result of severance costs in 2013 offset in part by increased salaries from our annual focal review. In addition, these costs were partially offset by higher customer credit card processing fees from increased volume on revenues.

As previously noted,in March 2014, the IRS informed us that our aligners are not subject to the medical device excise tax ("MDET"), which we had been paying and expensing in general and administrative expenses in the consolidated statements of operations since January 1, 2013. In future quarters of 2014, we expect our general and administrative expense in relation to the MDET to decrease by approximately $1.8 million per quarter based on current revenues. Additionally, we are in process of claiming a $8.0 million refund of MDET paid in 2013 and 2014; however, because this claim is subject to review and approval by the IRS, we have not recorded a receivable as the outcome of our audit is uncertain. Any future changes in the applicability of the MDET as it applies to us or refunds of amounts previously paid will be recorded as an additional expense or a credit to the consolidated statement of operations in the period in which is becomes probable and reasonably estimable.

Research and development (in millions):

	Three Months Ended March 31,
	2014			2013			Change
Research and development	$	13.4		$	11.3		$	2.1
% of net revenues	7.4		%	7.3		%

Research and development expense includes the personnel-related costs and outside consulting expenses associated with the research and development of new products and enhancements to existing products, corporate allocations, facility and facility related costs and stock-based compensation expense.

Research and development expense during the three months ended March 31, 2014, compared to the same period in 2013 increased slightly primarily due to of higher compensation costs from additional headcount, increased salaries from our annual focal review and higher stock-based compensation.

Impairment of goodwill (in millions):

	Three Months Ended March 31,
	2014			2013			Change
Impairment of goodwill	$	—		$	40.7		$	(40.7	)
% of net revenues	—		%	26.5		%

There was no goodwill impairment charge recorded in the first quarter of 2014.

In the first quarter of 2013, we determined that the goodwill for our Scanner reporting unit should be tested for impairment between annual tests since an event occurred or circumstances changed that would more likely than not reduce the fair value of our Scanner reporting unit below its carrying amount. As a result of our analysis, we recorded a goodwill impairment charge of $40.7 million in the first quarter of 2013, none of which was deductible for tax purposes. Refer to Note 5 for details of the impairment analysis.

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Impairment of long-lived assets (in millions):

	Three Months Ended March 31,
	2014			2013			Change
Impairment of long-lived assets	$	—		$	26.3		$	(26.3	)
% of net revenues	—		%	17.1		%

We recorded $26.3 million related to the impairment of long-lived assets during the first quarter of 2013 as a result of changes in the competitive environment of our intra-oral scanners, which included announcements of new low-priced scanners targeted at orthodontists and general practitioner dentists in North America, which caused us to lower our expectations for growth and profitability for our Scanner reporting unit. Therefore, we determined that the carrying value of the long-lived assets was not recoverable and recorded an impairment charge of $26.3 million. Refer to Note 5 for details of the impairment analysis.

Interest and other income (expense), net (in millions):

	Three Months Ended March 31,
	2014		2013			Change
Interest and other income (expense), net	$	0.6	$	(1.0	)	$	1.6

Interest and other income (expense), net, includes interest income earned on cash, cash equivalents and investment balances, foreign currency translation gains and losses and other miscellaneous charges.

Interest and other income (expense), net for the three months ended March 31, 2014 increased compared to the same period in 2013 due to foreign exchange gains in the current year period primarily as a result of the weakening of the U.S. dollar to the Euro as compared to losses in the prior year period.

Income tax (in millions):

	Three Months Ended March 31,
	2014			2013			Change
Provision for income taxes	$	10.0		$	2.9		$	7.1
Effective tax rates	23.5		%	(7.5		)%

Our provision for income taxes was $10.0 million and $2.9 million for the three months ended March 31, 2014 and 2013, respectively. This represents effective tax rates of 23.5% and (7.5)%, respectively. The increase in provision for income taxes was primarily due to higher pre-tax income, which was partially offset by a jurisdictional shift in forecasted earnings from the U.S. to lower-tax non-U.S. jurisdictions. The effective tax rate for the three months ended March 31, 2013 reflects a non-deductible goodwill impairment charge of $40.7 million.

We exercise significant judgment in regards to estimates of future market growth, forecasted earnings and projected taxable income in determining the provision for income taxes, and for purposes of assessing our ability to utilize any future benefit from deferred tax assets.

As of March 31, 2014, we maintained a valuation allowance of $35.4 million against deferred tax assets primarily related to foreign net operating loss carryforwards and capital loss carryforwards. These net operating and capital loss carryforwards would result in an income tax benefit if we were to conclude it is more likely than not that the related deferred tax assets will be realized.

During the three months ended March 31, 2014, the change in our gross unrecognized tax benefits was not material. The total amount of gross unrecognized tax benefits was $27.9 million as of March 31, 2014, all of which would impact our effective tax rate if recognized. We have elected to recognize interest and penalties related to unrecognized tax benefits as a component of income taxes. The change in accrued interest and penalties during the three months ended March 31, 2014, was not material. We do not expect any significant changes to the amount of unrecognized tax benefit within the next twelve months.

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During the first quarter of 2014, we adopted ASU 2013-11, "Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force)." The adoption of this standard had the effect of reducing our accruals for uncertain tax positions by $8.4 million, with an offsetting reduction in our long term deferred tax assets, but had no effect on net income.

We are subject to taxation in the U.S. and various states and foreign jurisdictions. All of our tax years will be open to examination by the U.S. federal and most state tax authorities due to our net operating loss and overall credit carryforward position. With few exceptions, we are no longer subject to examination by foreign tax authorities for years before 2006.

Liquidity and Capital Resources

We fund our operations from product sales and the proceeds from the sale of our common stock. As of March 31, 2014 and December 31, 2013, we had the following cash, cash equivalents, and short-term and long-term marketable securities(in thousands):

	March 31, 2014		December 31, 2013
Cash and cash equivalents	$	182,766	$	242,953
Marketable securities, short-term	183,677		127,040
Marketable securities, long-term	138,929		101,978
Total cash, cash equivalents and short-term and long-term marketable securities	$	505,372	$	471,971

Cash flows (in thousands):

	Three Months Ended March 31,
	2014			2013
Net cash flow (used in) provided by:
Operating activities	$	17,993		$	10,418
Investing activities	(99,347		)	(3,445		)
Financing activities	21,061			15,423
Effects of exchange rate changes on cash and cash equivalents	106			(37		)
Net (decrease) increase in cash and cash equivalents	$	(60,187	)	$	22,359

As of March 31, 2014, we had $505.4 million of cash, cash equivalents and short-term and long-term marketable securities. Cash equivalents and marketable securities are comprised of money market funds and debt instruments which include commercial paper, corporate bonds, U.S. government agency bonds, U.S. dollar dominated foreign corporate bonds, U.S. government treasury bonds, municipal securities and asset-backed securities.

As of March 31, 2014, approximately $238.7 million of cash, cash equivalents and short-term and long-term marketable securities was held by our foreign subsidiaries. Amounts held by foreign subsidiaries are generally subject to U.S. income taxation on repatriation to the U.S. The costs to repatriate our foreign earnings to the U.S. would likely be material; however, our intent is to permanently reinvest our earnings from foreign operations, and our current plans do not require us to repatriate them to fund our U.S. operations as we generate sufficient domestic operating cash flow and have access to external funding under our current revolving line of credit.

On April 28, 2014, we announced that we entered into an accelerated share repurchase agreement (ASR) with Goldman, Sachs & Co. to repurchase $70.0 million of our common stock. The ASR is part of our $300.0 million stock repurchase program announced on April 23, 2014. Under the terms of the ASR, we agreed to repurchase in total $70.0 million of our common stock from Goldman, Sachs & Co., with an initial delivery of approximately 1.0 million shares based on current market prices. The final number of shares to be repurchased will be based on our volume-weighted average stock price during the term of the transaction, less an agreed upon discount. We expect to finance the ASR with current cash on hand and for it to be completed by July 29, 2014.

On March 22, 2013, we entered into a credit facility with Wells Fargo Bank. The credit facility provides for a $50.0 million revolving line of credit, with a $10.0 million letter of credit sublimit, and has a maturity date on March 22, 2016. The credit facility also requires us to maintain a minimum unrestricted cash balance of $50.0 million and comply with specific

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financial conditions and performance requirements. The loans bear interest, at our option, at a fluctuating rate per annum equal to the daily one-month adjusted LIBOR rate plus a spread of 1.75% or an adjusted LIBOR rate (based on one, three, six or twelve-month interest periods) plus a spread of 1.75%. As of March 31, 2014, we had no outstanding borrowings under this credit facility and were in compliance with the conditions and performance requirements.

We believe that our current cash and cash equivalents and marketable debt securities combined with our positive cash flows from operations will be sufficient to fund our operations for at least the next 12 months. If we are unable to generate adequate operating cash flows, we may need to seek additional sources of capital through equity or debt financing, collaborative or other arrangements with other companies, bank financing and other sources in order to realize our objectives and to continue our operations. There can be no assurance that we will be able to obtain additional debt or equity financing on terms acceptable to us, or at all. If adequate funds are not available, we may need to make business decisions that could adversely affect our operating results such as modifications to our pricing policy, business structure or operations.  Accordingly, the failure to obtain sufficient funds on acceptable terms when needed could have a material adverse effect on our business, results of operations and financial condition.

Operating Activities

For the three months ended March 31, 2014, cash flows from operations of $18.0 million resulted primarily from our net income of approximately $32.4 million as well as the following:

Significant non-cash activities:

• Excess tax benefits from our share-based compensation arrangements of $13.6 million,

• deferred taxes of $12.8 million,

• stock-based compensation of $9.1 million related to equity incentive compensation awards granted to our employees, and

• depreciation and amortization of property, plant and equipment and intangibles of $4.8 million.

Significant changes in working capital:

• A decrease of $15.3 million in accrued and other long-term liabilities due to the payment of our 2013 annual bonuses, and

• an increase of $13.9 million in accounts receivable which is a result of the increase in net revenues.

Investing Activities

Net cash used in investing activities was $99.3 million for the three months ended March 31, 2014 primarily consisted of purchases of marketable securities of $157.9 million, property, plant and equipment purchases of $5.0 million. These outflows were partially offset by $63.7 million of maturities and sales of our marketable securities.

For the remainder of 2014, we expect to spend an additional $35.0 million to $45.0 million on capital expenditures for estimated total capital expenditures of $40.0 million to $50.0 million for 2014 primarily for additional manufacturing capacity and infrastructure. Although we believe our current investment portfolio has little risk of impairment, we cannot predict future market conditions or market liquidity and can provide no assurance that our investment portfolio will remain unimpaired.

Financing Activities

Net cash provided by financing activities was $21.1 million for the three months ended March 31, 2014 primarily resulting from $11.9 million proceeds from issuance of common stock, $13.6 million from excess tax benefit from our share-based compensation arrangements. These inflows were offset by $4.5 million related to payroll taxes paid for vesting of restricted stock units through share withholdings.

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Contractual Obligations

Our contractual obligations have not significantly changed since December 31, 2013 as disclosed in our Annual Report on Form 10-K. We believe that our current cash, cash equivalents and short-term marketable securities combined with our existing borrowing capacity will be sufficient to fund our operations for at least the next 12 months. If we are unable to generate adequate operating cash flows and need more funds beyond those available under our credit facility, we may need to seek additional sources of capital through equity or debt financing, collaborative or other arrangements with other companies, bank financing and other sources in order to realize our objectives and to continue our operations. There can be no assurance that we will be able to obtain additional debt or equity financing on terms acceptable to us, or at all. If adequate funds are not available, we may need to make business decisions that could adversely affect our operating results such as modifications to our pricing policy, business structure or operations. Accordingly, the failure to obtain sufficient funds on acceptable terms when needed could have a material adverse effect on our business, results of operations and financial condition.

Off-Balance Sheet Arrangements

As of March 31, 2014, we had no off-balance sheet arrangements that have, or are reasonably likely to have, a current or future material effect on our consolidated financial condition, results of operations, liquidity, capital expenditures or capital resources.

Indemnification Provisions

In the normal course of business to facilitate transactions in our services and products, we indemnify certain parties: customers, vendors, lessors and other parties with respect to certain matters, including, but not limited to, services to be provided by us and intellectual property infringement claims made by third parties. In addition, we have entered into indemnification agreements with our directors and certain of our officers that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. Several of these agreements limit the time within which an indemnification claim can be made and the amount of the claim.

It is not possible to make a reasonable estimate of the maximum potential amount under these indemnification agreements due to the unique facts and circumstances involved in each particular agreement. Additionally, we have a limited history of prior indemnification claims and the payments we have made under such agreements have not had a material adverse effect on our results of operations, cash flows, or financial position. However, to the extent that valid indemnification claims arise in the future, future payments by us could be significant and could have a material adverse effect on our results of operations or cash flows in a particular period. As of March 31, 2014, we did not have any material indemnification claims that were probable or reasonably possible.

Critical Accounting Policies and Estimates

Management’s discussion and analysis of our financial condition and results of operations is based upon our Condensed Consolidated Financial Statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. The preparation of condensed consolidated financial statements requires our management to make estimates and judgments that affect the reported amounts of assets and liabilities, net revenues and expenses and disclosures at the date of the financial statements. We evaluate our estimates on an on-going basis, including those related to revenue recognition, accounts receivable, intangible assets, legal contingencies, impairment of goodwill and income taxes. We use authoritative pronouncements, historical experience and other assumptions as the basis for making estimates. Actual results could differ from those estimates.

We believe the following critical accounting policies reflect our most significant estimates, judgments and assumptions used in the preparation of our consolidated financial statements. These critical accounting policies and related disclosures appear in our Annual Report on Form 10-K for the year ended December 31, 2013:

• Revenue recognition;

• Stock-based compensation expense;

• Goodwill and finite-lived acquire assets,

• Impairment of goodwill, finite-lived acquire assets and long-lived assets, and

• Accounting for Income Taxes.

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Recent Accounting Pronouncements

See Note 1 “Summary of Significant Accounting Policies” of the Notes to Condensed Consolidated Financial Statements for a discussion of recent accounting pronouncements.

ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

For quantitative and qualitative disclosures about market risk affecting us, see Item 7A, “Quantitative and Qualitative Disclosures About Market Risk,” in our Annual Report on Form 10-K for the year ended December 31, 2013, which is incorporated herein by reference. Our exposure to market risk has not changed materially since December 31, 2013.

ITEM 4.CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures.

Under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, we have evaluated the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of the end of the period covered by this Quarterly Report on Form 10-Q. Based upon that evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that our disclosure controls and procedures are effective as of March 31, 2014, to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and our Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure, and that such information is recorded, processed, summarized and reported within the time periods specified in the SEC rules and forms.

Changes in internal control over financial reporting.

There were no changes in our internal control over financial reporting that occurred during the period covered by this report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II—OTHER INFORMATION

ITEM 1.     LEGAL PROCEEDINGS

Securities Class Action Lawsuit

On November 28, 2012, plaintiff City of Dearborn Heights Act 345 Police & Fire Retirement System filed a lawsuit against Align, Thomas M. Prescott (“Mr. Prescott”), Align’s President and Chief Executive Officer, and Kenneth B. Arola (“Mr. Arola”), Align’s former Vice President, Finance and Chief Financial Officer, in the United States District Court for the Northern District of California on behalf of a purported class of purchasers of our common stock (the “Securities Action”). On July 11, 2013, an amended complaint was filed, which named the same defendants, on behalf of a purported class of purchasers of our common stock between January 31, 2012 and October 17, 2012. The amended complaint alleged that Align, Mr. Prescott and Mr. Arola violated Section 10(b) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder, and that Mr. Prescott and Mr. Arola violated Section 20(a) of the Securities Exchange Act of 1934. Specifically, the amended complaint alleged that during the purported class period defendants failed to take an appropriate goodwill impairment charge related to the April 29, 2011 acquisition of Cadent Holdings, Inc. in the fourth quarter of 2011, the first quarter of 2012 or the second quarter of 2012, which rendered our financial statements and projections of future earnings materially false and misleading and in violation of U.S. GAAP. The amended complaint sought monetary damages in an unspecified amount, costs and attorneys’ fees. On December 9, 2013, the court granted defendants’ motion to dismiss with leave for plaintiff to file a second amended complaint. Plaintiff filed a second amended complaint on January 8, 2014 on behalf of the same purported class. The second amended complaint states the same claims as the amended complaint. We filed a motion to dismiss the second amended complaint on February 7, 2014. Align intends to vigorously defend itself against these allegations. Align is currently unable to predict the outcome of this amended complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.

Shareholder Derivative Lawsuit

On February 1, 2013, plaintiff Gary Udis filed a shareholder derivative lawsuit against several of Align’s current and former officers and directors in the Superior Court of California, County of Santa Clara. The complaint alleges that our reported income and earnings were materially overstated because of a failure to timely write down goodwill related to the April 29, 2011 acquisition of Cadent Holdings, Inc., and that defendants made allegedly false statements concerning our forecasts. The complaint asserts various state law causes of action, including claims of breach of fiduciary duty, unjust enrichment, and insider trading, among others. The complaint seeks unspecified damages on behalf of Align, which is named solely as nominal defendant against whom no recovery is sought. The complaint also seeks an order directing Align to reform and improve its corporate governance and internal procedures, and seeks restitution in an unspecified amount, costs, and attorneys’ fees. On July 8, 2013, an Order was entered staying this derivative lawsuit until an initial ruling on our first motion to dismiss the Securities Action. On January 15, 2014, an Order was entered staying this derivative lawsuit until an initial ruling on our second motion to dismiss the Securities Action. Align is currently unable to predict the outcome of this complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible losses.

In addition, in the course of Align's operations, Align is involved in a variety of claims, suits, investigations, and proceedings, including actions with respect to intellectual property claims, patent infringement claims, government investigations, labor and employment claims, breach of contract claims, tax, and other matters. Regardless of the outcome, these proceedings can have an adverse impact on us because of defense costs, diversion of management resources, and other factors. Although the results of complex legal proceedings are difficult to predict and Align's view of these matters may change in the future as litigation and events related thereto unfold; Align currently does not believe that these matters, individually or in the aggregate, will materially affect Align's financial position, results of operations or cash flows.

ITEM 1A.RISK FACTORS

We depend on the sale of the Invisalign system for the vast majority of our net revenues, and any decline in sales of Invisalign treatment for any reason, a continued weakness in general economic conditions, or a decline in average selling prices would adversely affect net revenues, gross margin and net income.

We expect that net revenues from the sale of the Invisalign System, primarily Invisalign Full and Invisalign Teen, will continue to account for the vast majority of our total net revenues for the foreseeable future.  Continued and widespread market acceptance of Invisalign by orthodontists, GPs and consumers is critical to our future success.  If orthodontists and GPs experience a reduction in consumer demand for orthodontic services, if consumers prove unwilling to adopt Invisalign as

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rapidly as we anticipate or in the volume that we anticipate, if orthodontists or GPs choose to use a competitive product rather than Invisalign or if the average selling price of our product declines, our operating results would be harmed.

Demand for our products may not increase as rapidly as we anticipate due to a variety of factors including a continued weakness in general economic conditions.

Consumer spending habits are affected by, among other things, prevailing economic conditions, levels of employment, salaries and wage rates, gas prices, consumer confidence and consumer perception of economic conditions.  A general slowdown in the U.S. economy and certain international economies or an uncertain economic outlook would adversely affect consumer spending habits which may, among other things, result in a decrease in the number of overall orthodontic case starts, reduced patient traffic in dentists’ offices, reduction in consumer spending on higher value procedures or a reduction in the demand for dental services generally, each of which would have a material adverse effect on our sales and operating results.  Continued weakness in the global economy results in a challenging environment for selling dental technologies and dentists may postpone investments in capital equipment, such as intra-oral scanners.  In addition, Invisalign treatment, which currently accounts for the vast majority of our net revenues, represents a significant change from traditional orthodontic treatment, and customers and consumers may be reluctant to accept it or may not find it preferable to traditional treatment. We have generally received positive feedback from orthodontists, GPs and consumers regarding Invisalign treatment as both an alternative to braces and as a clinical method for treatment of malocclusion, but a number of dental professionals believe that Invisalign treatment is appropriate for only a limited percentage of their patients.  Increased market acceptance of all of our products will depend in part upon the recommendations of dental professionals, as well as other factors including effectiveness, safety, ease of use, reliability, aesthetics, and price compared to competing products.

The frequency of use of the Invisalign system by orthodontists or GPs may not increase at the rate that we anticipate or at all.

One of our key objectives is to continue to increase utilization, or the adoption and frequency of use, of the Invisalign System by new and existing customers. If utilization of the Invisalign System by our existing and newly trained orthodontists or GPs does not occur or does not occur as quickly as we anticipate, our operating results could be harmed.

We may experience declines in average selling prices of our products which may decrease our net revenues.

In response to challenges in our business, including increased competition, we have in the past reduced the list price of our products. We also provide volume based discount programs to our doctors. In addition, we sell a number of products at different list prices. If we introduce any price reductions or consumer rebate programs; if we expand our discount programs in the future or participation in these programs increases; if our product mix shifts to lower priced products or products that have a higher percentage of deferred revenue; or if sales by our distributors grows at a faster pace than our direct sales, our average selling prices would be adversely affected and our net revenues, gross profit, gross margin and net income may be reduced.  Furthermore, although the U.S. dollar is our reporting currency, a portion of our net revenues and net income are generated in foreign currencies.  Net revenues and net income generated by subsidiaries operating outside of the U.S. are translated into U.S. dollars using exchange rates effective during the respective period and are affected by changes in exchange rates. As a result, negative movements in currency exchange rates against the U.S. dollar will adversely affect our average selling price and consequently the amount of net revenues and net income in our consolidated financial statements.

As we continue to grow, we are subject to growth related risks, including risks related to excess or constrained capacity at our existing facilities.

We are subject to growth related risks, including capacity constraints and pressure on our internal systems and personnel.  In order to manage current operations and future growth effectively, we will need to continue to implement and improve our operational, financial and management information systems and to hire, train, motivate, manage and retain employees. We may be unable to manage such growth effectively. Any such failure could have a material adverse impact on our business, operations and prospects. 

 Because we cannot always immediately adapt our production capacity and related cost structures to changing market conditions, our manufacturing capacity may at times exceed or fall short of our production requirements. In addition, if product demand decreases or we fail to forecast demand accurately, we could be required to write off inventory or record excess capacity charges, which would lower our gross margin. Any or all of these problems could result in the loss of customers, provide an opportunity for competing products to gain market acceptance and otherwise harm our business and financial results.

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We may never achieve the anticipated benefits from our acquisitions which may have an adverse effect on our business.

We acquired Cadent Holdings, Inc. in April 2011 for their people, their technology and their existing revenue streams such as, OrthoCAD iRecord and OrthoCAD iCast in addition to their intra-oral scanning technology. This acquisition is expected to strengthen our ability to drive adoption of Invisalign treatment by integrating more fully with mainstream tools and procedures in doctors’ practices. In addition, we believe that the combination of the two companies will help accelerate the use of intra-oral scanning in the dental industry by leveraging Align’s global sales reach, extensive professional and consumer marketing capabilities and large customer base.  We completed the acquisition of our Asia Pacific distributor on April 30, 2013.

We may experience difficulties in achieving the anticipated financial or strategic benefits of these acquisitions. Potential risks include:

• slower adoption or lack of acceptance for intra-oral scanning products in general or our chairside features;

• our inability to increase utilization by integrating Invisalign treatment more fully with intra-oral scanners;

• difficulty in integrating the technology, operations, internal accounting controls or work force of the acquired business with our existing business;

• diversion of management resources and focus from ongoing business matters;

• retention of key employees following the acquisition;

• continued changes in the competitive environment, including recent announcements from competitors of new lower-priced scanners which we expect will lengthen the customer evaluation process and may result in price reductions and/or loss of sales;

• difficulty dealing with tax, employment, logistics, and other related issues unique to international operations in Israel and the Asia Pacific region;

• possible impairment of relationships with employees and customers as a result of the integration;

• possible inconsistencies in standards, controls, procedures and policies among the acquired businesses and Align, which may make it more difficult to implement and harmonize worldwide financial reporting, accounting, billing, information technology and other systems;

• a large portion of Cadent’s operations are located in Israel, accordingly, any increase in hostilities in the Middle East involving Israel may cause interruption or suspension of business operations without warning; and

• negative impact on our results of operations and financial condition from acquisition-related charges, further impairment of goodwill, impairment of intangible assets and/or asset impairment charges.

If we cannot successfully integrate the acquired business with our existing business, our results of operations and financial condition could be adversely affected.

If we fail to sustain or increase profitability or revenue growth in future periods, the market price for our common stock may decline.

If we are to sustain or increase profitability in future periods, we will need to continue to increase our net revenues, while controlling our expenses. Because our business is evolving, it is difficult to predict our future operating results or levels of growth, and we have in the past not been and may in the future not be able to sustain our historical growth rates. If we do not increase profitability or revenue growth or otherwise meet the expectations of securities analysts or investors, the market price of our common stock will likely decline.

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Our financial results have fluctuated in the past and may fluctuate in the future which may cause volatility in our stock price.

Our operating results have fluctuated in the past and we expect our future quarterly and annual operating results to fluctuate as we focus on increasing doctor and consumer demand for our products. These fluctuations could cause our stock price to decline or significantly fluctuate. Some of the factors that could cause our operating results to fluctuate include:

• limited visibility into and difficulty predicting the level of activity in our customers’ practices from quarter to quarter;

• weakness in consumer spending as a result of the slowdown in the U.S. economy and global economies;

• changes in relationships with our distributors;

• changes in the timing of receipt of Invisalign case product orders during a given quarter which, given our cycle time and the delay between case receipts and case shipments, could have an impact on which quarter revenue can be recognized;

• fluctuations in currency exchange rates against the U.S. dollar;

• changes in product mix;

• our inability to predict from period to period the number of trainers or the availability of doctors required to complete intra-oral scanner installations, which may impact the timing of when revenue is recognized;

• if participation in our customer rebate program increases our average selling price will be adversely affected;

• seasonal fluctuations in the number of doctors in their offices and their availability to take appointments;

• success of or changes to our marketing programs from quarter to quarter;

• our reliance on our contract manufacturers for the production of sub-assemblies for our intra-oral scanners;

• timing of industry tradeshows;

• changes in the timing of when revenue is recognized, including as a result of the introduction of new products or promotions or as a result of changes to critical accounting estimates or new accounting pronouncements;

• changes to our effective tax rate;

• unanticipated delays in production caused by insufficient capacity or availability of raw materials;

• any disruptions in the manufacturing process, including unexpected turnover in the labor force or the introduction of new production processes, power outages or natural or other disasters beyond our control;

• the development and marketing of directly competitive products by existing and new competitors;

• major changes in available technology or the preferences of customers may cause our current product offerings to become less competitive or obsolete;

• aggressive price competition from competitors;

• costs and expenditures in connection with litigation;

• the timing of new product introductions by us and our competitors, as well as customer order deferrals in anticipation of enhancements or new products;

• disruptions to our business due to political, economic or other social instability, including the impact of an epidemic any of which results in changes in consumer spending habits, consumers unable or unwilling to visit the orthodontist or general practitioners office, as well as any impact on workforce absenteeism;

• inaccurate forecasting of net revenues, production and other operating costs; and

• investments in research and development to develop new products and enhancements.

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To respond to these and other factors, we may need to make business decisions that could adversely affect our operating results such as modifications to our pricing policy, business structure or operations. Most of our expenses, such as employee compensation and lease payment obligations, are relatively fixed in the short term. Moreover, our expense levels are based, in part, on our expectations regarding future revenue levels. As a result, if our net revenues for a particular period fall below our expectations, whether caused by changes in consumer spending, consumer preferences, weakness in the U.S. or global economies, changes in customer behavior related to advertising and prescribing our product, or other factors, we may be unable to adjust spending quickly enough to offset any shortfall in net revenues. Due to these and other factors, we believe that quarter-to-quarter comparisons of our operating results may not be meaningful. You should not rely on our results for any one quarter as an indication of our future performance.

Our future success may depend on our ability to develop, successfully introduce and achieve market acceptance of new products.

Our future success may depend on our ability to develop, manufacture, market, and obtain regulatory approval or clearance of new products. There can be no assurance that we will be able to successfully develop, sell and achieve market acceptance of these and other new products and applications and enhanced versions of our existing product or software. The extent of, and rate at which, market acceptance and penetration are achieved by future products is a function of many variables, which include, among other things, our ability to:

• correctly identify customer needs and preferences and predict future needs and preferences;

• include functionality and features that address customer requirements;

• ensure compatibility of our computer operating systems and hardware configurations with those of our customers;

• allocate our research and development funding to products with higher growth prospects;

• anticipate and respond to our competitors’ development of new products and technological innovations;

• differentiate our offerings from our competitors’ offerings;

• innovate and develop new technologies and applications;

• the availability of third-party reimbursement of procedures using our products;

• obtain adequate intellectual property rights; and

• encourage customers to adopt new technologies.

If we fail to accurately predict customer needs and preferences or fail to produce viable technologies, we may invest heavily in research and development of products that do not lead to significant revenue. Even if we successfully innovate and develop new products and produce enhancements, we may incur substantial costs in doing so, and our profitability may suffer.  In addition, even if our new products are successfully introduced, it is unlikely that they will rapidly gain market share and acceptance primarily due to the relatively long period of time it takes to successfully treat a patient with Invisalign. Since it takes approximately 12 to 24 months to treat a patient, our customers may be unwilling to rapidly adopt our new products until they successfully complete at least one case or until more historical clinical results are available.

Our ability to market and sell new products may also be subject to government regulation, including approval or clearance by the FDA, and foreign government agencies. Any failure in our ability to successfully develop and introduce or achieve market acceptance of our new products or enhanced versions of existing products could have a material adverse effect on our operating results and could cause our net revenues to decline.

A disruption in the operations of our primary freight carrier or higher shipping costs could cause a decline in our net revenues or a reduction in our earnings.

We are dependent on commercial freight carriers, primarily UPS, to deliver our products to our customers. If the operations of these carriers are disrupted for any reason, we may be unable to deliver our products to our customers on a timely basis. If we cannot deliver our products in an efficient and timely manner, our customers may reduce their orders from us and our net revenues and operating profits could materially decline. In a rising fuel cost environment, our freight costs will increase. If freight costs materially increase and we are unable to pass that increase along to our customers for any reason or otherwise offset such increases in our cost of net revenues, our gross margin and financial results could be adversely affected.

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We are dependent on our international operations, which exposes us to foreign operational, political and other risks that may harm our business.

Our key production steps are performed in operations located outside of the U.S.  At our facility in San Jose, Costa Rica, technicians use a sophisticated, internally developed computer-modeling program to prepare digital treatment plans, which are then transmitted electronically to Juarez, Mexico. These digital files form the basis of the ClinCheck treatment plan and are used to manufacture aligner molds. Our order acquisition, aligner fabrication and shipping operations are conducted in Juarez, Mexico. In addition to the research and development efforts conducted in our San Jose, California facility, we also carry out research and development at locations in Moscow, Russia. In addition, our customer-care, accounts receivable, credit and collections and customer event registration organizations are located at our facility in San Jose, Costa Rica. We also have operations in Israel where the design and wand assembly and our intra-oral scanner are manufactured. Our reliance on international operations exposes us to risks and uncertainties that may affect our business or results of operation, including:

• difficulties in hiring and retaining employees generally, as well as difficulties in hiring and retaining employees with the necessary skills to perform the more technical aspects of our operations;

• difficulties in managing international operations;

• fluctuations in currency exchange rates;

• increased income taxes, and other restrictions and limitations, if we were to decide to repatriate any of our foreign cash balances back to the U.S.;

• import and export license requirements and restrictions;

• controlling production volume and quality of the manufacturing process;

• political, social and economic instability, including as a result of increased levels of violence in Juarez, Mexico or the Middle East;

• acts of terrorism and acts of war;

• interruptions and limitations in telecommunication services;

• product or material transportation delays or disruption, including as a result of health epidemics restricting travel to and from our international locations or as a result of natural disasters, such as earthquakes or volcanic eruptions;

• burdens of complying with a wide variety of local country and regional laws;

• trade restrictions and changes in tariffs; and

• potential adverse tax consequences.

If any of these risks materialize in the future, we could experience production delays and lost or delayed revenue.

We earn an increasingly larger portion of our total revenues from international sales and face risks attendant to those operations.

We earn an increasingly larger portion of our total revenues from international sales generated through our foreign direct and indirect operations. As a result of these sales operations, we face a variety of risks, including:

• local political and economic instability;

• the engagement of activities by our employees, contractors, partners and agents, especially in countries with developing economies, that are prohibited by international and local trade and labor laws and other laws prohibiting corrupt payments to government officials, including the Foreign Corrupt Practices Act, the UK Bribery Act of 2010 and export control laws, in spite of our policies and procedures designed to ensure compliance with these laws;

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• although it is our intention to permanently reinvest earnings outside the U.S., restrictions on the transfer of funds held by our foreign subsidiaries, including with respect to restrictions on our ability to repatriate foreign cash to the U.S at favorable tax rates;

• fluctuations in currency exchange rates; and

• increased expense of developing, testing and making localized versions of our products.

Any of these factors, either individually or in combination, could materially impact our international operations and adversely affect our business as a whole.

A key step in our manufacturing process relies on sophisticated computer technology that requires new technicians to undergo a relatively long training process. If we are unable to accurately predict our volume growth, and fail to hire a sufficient number of technicians in advance of such demand, the delivery time of our products could be delayed which could adversely affect our results of operations.

Training production technicians takes approximately 90 to 120 days. As a result, if we are unable to accurately predict our volume growth, we may not have a sufficient number of trained technicians to deliver our products within the timeframe our customers expect. Such a delay could cause us to lose existing customers or fail to attract new customers. This could cause a decline in our net revenues and net income and could adversely affect our results of operations.

Our headquarters, digital dental modeling processes, and other manufacturing processes are principally located in regions that are subject to earthquakes and other natural disasters.

Our digital dental modeling is processed in our facility located in San Jose, Costa Rica. The operations team in Costa Rica creates ClinCheck treatment plans using sophisticated computer software. In addition, our customer facing operations are located in Costa Rica. Our aligner molds and finished aligners are fabricated in Juarez, Mexico.  Both locations in Costa Rica and Mexico are in earthquake zones and may be subject to other natural disasters.  If there is a major earthquake or any other natural disaster in a region where one of these facilities is located, our ability to create ClinCheck treatment plans, respond to customer inquiries or manufacture and ship our aligners could be compromised which could result in our customers experiencing a significant delay in receiving their completed aligners and a decrease in service levels for a period of time. In addition, our headquarters facility in California is located in the San Francisco Bay Area. An earthquake or other natural disaster in this region could result in a disruption in our operations. Any such business interruption could materially and adversely affect our business, financial condition and results of operations.

Competition in the markets for our products is intense and we expect aggressive competition from existing competitors and other companies that may introduce new technologies in the future.

Currently, our products compete directly against products manufactured and distributed by various companies, both within and outside the U.S. Many of these manufacturers, including Danaher Corporation, 3M, Sirona Dental Systems, Inc. and Dentsply International, have substantially greater financial resources and manufacturing and marketing experience than we do and may, in the future, attempt to develop an orthodontic system similar to ours or combine technologies that make our product economically unattractive. The expiration of key certain patents commencing in 2017 owned by us may result in additional competition. Large consumer product companies may also enter the orthodontic supply market. Furthermore, we may face competition in the future from new companies that may introduce new technologies. We may be unable to compete with these competitors and one or more of these competitors may render our technology obsolete or economically unattractive.  If we are unable to compete effectively with existing products or respond effectively to any products developed by new or existing competitors, our business could be harmed. Increased competition has resulted in the past and may in the future result in volume discounting and price reductions, reduced gross margins, reduced profitability and loss of market share, and reduce dental professionals’ efforts and commitment to expand their use of our products, any of which could have a material adverse effect on our net revenues, volume growth, net income (loss) and stock price. We cannot assure you that we will be able to compete successfully against our current or future competitors or that competitive pressures will not have a material adverse effect on our business, results of operations and financial condition.

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Our information technology systems are critical to our business. System integration and implementation issues and system security risks could disrupt our operations, which could have a material adverse impact on our business and operating results.

We rely on the efficient and uninterrupted operation of complex information technology systems. All information technology systems are vulnerable to damage or interruption from a variety of sources. As our business has grown in size and complexity, the growth has placed, and will continue to place, significant demands on our information technology systems. To effectively manage this growth, our information systems and applications require an ongoing commitment of significant resources to maintain, protect and enhance existing systems and develop new systems to keep pace with continuing changes in information processing technology, evolving industry and regulatory standards and changing customer preferences. If the information we rely upon to run our businesses were to be found to be inaccurate or unreliable, if we fail to properly maintain our information systems and data integrity, or if we fail to develop new capabilities to meet our business needs in a timely manner, we could have operational disruptions, have customer disputes, lose our ability to produce timely and accurate reports, have regulatory or other legal problems, have increases in operating and administrative expenses, lose existing customers, have difficulty in attracting new customers or in implementing our growth strategies, or suffer other adverse consequences. In addition, experienced computer programmers and hackers may be able to penetrate our network security and misappropriate our confidential information or that of third parties, create system disruptions or cause shutdowns. Furthermore, sophisticated hardware and operating system software and applications that we either internally develop or procure from third parties may contain defects in design and manufacture, including “bugs” and other problems that can unexpectedly interfere with the operation of the system. The costs to eliminate or alleviate security problems, viruses and bugs could be significant, and the efforts to address these problems could result in interruptions that may have a material adverse impact on our operations, net revenues and operating results.

We are currently focused on adding more functionality into our business enterprise systems to more efficiently integrate these systems with our other system applications, such as customer facing and manufacturing tools, and intend to continue this effort for the foreseeable future. System upgrades and enhancements require significant expenditures and allocation of valuable employee resources. Delays in integration or disruptions to our business from implementation of these new or upgraded systems could have a material adverse impact on our financial condition and operating results.

Additionally, we continuously upgrade our customer facing software applications, specifically the ClinCheck and MyAligntech software. Software applications frequently contain errors or defects, especially when they are first introduced or when new versions are released. The discovery of a defect or error or the incompatibility with the computer operating system and hardware configurations of customers in a new upgraded version or the failure of our primary information systems may result in the following consequences, among others: loss of revenue or delay in market acceptance, damage to our reputation or increased service costs, any of which could have a material adverse effect on our business, financial condition or results of operations.

Furthermore, our business requires the secure transmission of confidential information over public networks. Because of the confidential health information we store and transmit, security breaches could expose us to a risk of regulatory action, litigation, possible liability and loss. Our security measures may be inadequate to prevent security breaches, and our business operations and profitability would be adversely affected by, among other things, loss of customers and potential criminal and civil sanctions if they are not prevented.

There can be no assurance that our process of improving existing systems, developing new systems to support our expanding operations, integrating new systems, protecting confidential patient information, and improving service levels will not be delayed or that additional systems issues will not arise in the future. Failure to adequately protect and maintain the integrity of our information systems and data may result in a material adverse effect on our financial position, results of operations and cash flows.

If the security of our customer and patient information is compromised, patient care could suffer, and we could be liable for related damages, and our reputation could be impaired.

We retain confidential customer and patient information in our processing centers. Therefore, it is critical that our facilities and infrastructure remain secure and that our facilities and infrastructure are perceived by the marketplace and our customers to be secure. Despite the implementation of security measures, our infrastructure may be vulnerable to physical break-ins, computer viruses, programming errors, attacks by third parties or similar disruptive problems. If we fail to meet our clients’ expectations regarding the security of healthcare information, we could be liable for damages and our reputation could be impaired. In addition, patient care could suffer, and we could be liable if our systems fail to deliver correct information in a timely manner. Our insurance may not protect us from this risk.

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Our success depends in part on our proprietary technology, and if we are unable to successfully enforce our intellectual property rights, our competitive position may be harmed.  Litigating claims of this type is costly and could distract our management and cause a decline in our results of operations and stock price.

Our success will depend in part on our ability to maintain existing intellectual property and to obtain and maintain further intellectual property protection for our products, both in the U.S. and in other countries. Our inability to do so could harm our competitive position. As of March 31, 2014, we had issued 322 U.S. patents, 127 pending U.S. patent applications, and 241 foreign issued patents, and 121 pending foreign patent applications.

We intend to rely on our portfolio of issued and pending patent applications in the U.S. and in other countries to protect a large part of our intellectual property and our competitive position.  However, our currently pending or future patent filings may not result in the issuance of patents. Additionally, any patents issued to us may be challenged, invalidated, held unenforceable, circumvented, or may not be sufficiently broad to prevent third parties from producing competing products similar in design to our products. In addition, any protection afforded by foreign patents may be more limited than that provided under U.S. patents and intellectual property laws. We also rely on protection of our copyrights, trade secrets, know-how and proprietary information. We generally enter into confidentiality agreements with our employees, consultants and our collaborative partners upon commencement of a relationship with us; however, these agreements may not provide meaningful protection against the unauthorized use or disclosure of our trade secrets or other confidential information, and adequate remedies may not exist if unauthorized use or disclosure were to occur.  Our inability to maintain the proprietary nature of our technology through patents, copyrights or trade secrets would impair our competitive advantages and could have a material adverse effect on our operating results, financial condition and future growth prospects. In particular, a failure to protect our proprietary rights might allow competitors to copy our technology, which could adversely affect our pricing and market share.  In addition, in an effort to protect our intellectual property we have in the past been and may in the future be involved in litigation.  The potential effects on our business operations resulting from litigation that we may participate in the future, whether or not ultimately determined in our favor or settled by us, are costly and divert the efforts and attention of our management and technical personnel from normal business operations.

Litigation is subject to inherent uncertainties and unfavorable rulings could occur. An unfavorable ruling could include monetary damages or, in cases where injunctive relief is sought, an injunction prohibiting us from selling our products. Any of these results from our litigation could adversely affect our results of operations and stock price.

While we believe we currently have adequate internal control over financial reporting, we are required to assess our internal control over financial reporting on an annual basis and any future adverse results from such assessment could result in a loss of investor confidence in our financial reports and have an adverse effect on our stock price.

Pursuant to the Sarbanes-Oxley Act of 2002 and the rules and regulations promulgated by the SEC, we are required to furnish in our Form 10-K a report by our management regarding the effectiveness of our internal control over financial reporting. The report includes, among other things, an assessment of the effectiveness of our internal control over financial reporting as of the end of our fiscal year, including a statement as to whether or not our internal control over financial reporting is effective. This assessment must include disclosure of any material weaknesses in our internal control over financial reporting identified by management. While we believe our internal control over financial reporting is currently effective, the effectiveness of our internal controls to future periods is subject to the risk that our controls may become inadequate because of changes in conditions, and, as a result, the degree of compliance of our internal control over financial reporting with the policies or procedures may deteriorate. Establishing, testing and maintaining an effective system of internal control over financial reporting requires significant resources and time commitments on the part of our management and our finance staff, may require additional staffing and infrastructure investments, and would increase our costs of doing business. If we are unable to assert that our internal control over financial reporting is effective in any future period (or if our auditors are unable to express an opinion on the effectiveness of our internal controls or conclude that our internal controls are ineffective), we could lose investor confidence in the accuracy and completeness of our financial reports, which could have an adverse effect on our stock price.

If we lose our key personnel or are unable to attract and retain key personnel, we may be unable to pursue business opportunities or develop our products.

We are highly dependent on the key employees in our clinical engineering, technology development, sales, training and marketing personnel and management teams. The loss of the services provided by those individuals may significantly delay or prevent the achievement of our product development and other business objectives and could harm our business. Our future success will also depend on our ability to identify, recruit, train and retain additional qualified personnel, including

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orthodontists. Few orthodontists are accustomed to working in a manufacturing environment since they are generally trained to work in private practices, universities and other research institutions. Thus, we may be unable to attract and retain personnel with the advanced qualifications necessary for the further development of our business. Furthermore, we may not be successful in retaining our key personnel or their services. If we are unable to attract and retain key personnel, our business could be materially harmed. During 2013 and early 2014, we announced the appointment of four executive officers, including a new Chief Financial Officer. With these new appointments, there is the risk of uncertainty and instability relating to transition the duties and responsibilities to new key executives in an orderly, effective and efficient manner. In addition, our ability to recognize revenue on the direct sales of our intra-oral scanners depends in part upon our ability to schedule and staff trainings. The loss of the services provided by these individuals or our ability to timely hire such personnel in sufficient numbers based on our volume growth, may harm our business.  If we are unable to retain our trainers or replace such individuals with persons having equivalent technical expertise and qualifications, or if we are unable to successfully instill such technical expertise in newly hired personnel or accurately predict the number of such personnel needed, our net revenues could be materially harmed.

If we infringe the patents or proprietary rights of other parties or are subject to a patent infringement claim, our ability to grow our business may be severely limited.

Extensive litigation over patents and other intellectual property rights is common in the medical device industry. We have been sued for infringement of third party’s patents in the past and we may be the subject of patent or other litigation in the future. From time to time, we have received and may in the future receive letters from third parties drawing our attention to their patent rights.  While we do not believe that we infringe upon any valid and enforceable rights that have been brought to our attention, there may be other more pertinent rights of which we are presently unaware. The defense and prosecution of intellectual property suits, interference proceedings and related legal and administrative proceedings could result in substantial expense to us and significant diversion of effort by our technical and management personnel. An adverse determination of any litigation or interference proceeding to which we may become a party could subject us to significant liabilities. An adverse determination of this nature could also put our patents at risk of being invalidated or interpreted narrowly or require us to seek licenses from third parties. Licenses may not be available on commercially reasonable terms or at all, in which event, our business would be materially adversely affected.

We maintain single supply relationships for certain of our key machines and materials technologies, and our business and operating results could be harmed if supply is restricted or ends or the price of raw materials used in our manufacturing process increases.

We are highly dependent on manufacturers of specialized scanning equipment, rapid prototyping machines, resin and other advanced materials, as well as the optics, electronic and other mechanical components of our intra-oral scanners. We maintain single supply relationships for many of these machines and materials technologies. In particular, our CT scanning and stereolithography equipment used in our aligner manufacturing and many of the critical components for the optics of our scanners are provided by single suppliers. We are also committed to purchasing the vast majority of our resin and polymer, the primary raw materials used in our manufacturing process for clear aligners, from a single source. If these or other suppliers encounter financial, operating or other difficulties or if our relationship with them changes, we might not be able to quickly establish or qualify replacement sources of supply and could face production interruptions, delays and inefficiencies.  In addition, technology changes by our vendors could disrupt access to required manufacturing capacity or require expensive, time consuming development efforts to adapt and integrate new equipment or processes. Our growth may exceed the capacity of one or more of these manufacturers to produce the needed equipment and materials in sufficient quantities to support our growth. Conversely, in order to secure supplies for production of products, we sometimes enter into non-cancelable purchase commitments with vendors, which could impact our ability to adjust our inventory to reflect declining market demands. If demand for our products is less than we expect, we may experience additional excess and obsolete inventories and be forced to incur additional charges and our profitability may suffer. In the event of technology changes, delivery delays, or shortages of or increases in price for these items, our business and growth prospects may be harmed.

We depend on a single contract manufacturer and supplier of parts used in our iTero scanner and any disruption in this relationship may cause us to fail to meet the demands of our customers and damage our customer relationships.

We rely on a third party manufacturer in Israel to assemble our iTero scanner. As a result, if this third party manufacturer fails to deliver its components or if we lose its services, we may be unable to deliver our products in a timely manner and our business may be harmed. Any difficulties encountered by the third party manufacturer with respect to hiring personnel, and maintaining acceptable manufacturing standards, controls, procedures and policies could disrupt our ability to deliver our products in a timely manner. Finding a substitute manufacturer may be expensive, time-consuming or impossible and could result in a significant interruption in the supply of our intra-oral scanning products. Any failure by our contract manufacturer

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that results in delays in our fulfillment of customer orders may cause us to lose revenues and suffer damage to our customer relationships.

We primarily rely on our direct sales force to sell our products, and any failure to maintain our direct sales force could harm our business.

Our ability to sell our products and generate revenues primarily depends upon our direct sales force within our North American and international markets.  As of March 31, 2014, our North American sales organization consisted of approximately 275 people. Internationally, we had approximately 125 people engaged in direct sales and sales support as of March 31, 2014. We do not have any long-term employment contracts with the members of our direct sales force. The loss of the services provided by these key personnel may harm our business. If we are unable to retain our direct sales force personnel or replace them with individuals of equivalent technical expertise and qualifications, or if we are unable to successfully instill such technical expertise or if we fail to establish strong relationships with our customers within a relatively short period of time, our net revenues and our ability to maintain market share could be materially harmed. In addition, due to our large and fragmented customer base, we may not be able to provide all of our customers with product support immediately upon the launch of a new product. As a result, adoption of new products by our customers may be slower than anticipated and our ability to grow market share and increase our net revenues may be harmed.

If our distributor relationships are not successful, our ability to market and sell our products would be harmed and our financial performance will be adversely affected.

We depend on relationships with distributors for the marketing and sales of our products in various geographic regions, and we have a limited ability to influence their efforts. Relying on distributors for our sales and marketing could harm our business for various reasons, including:

• agreements with distributors may terminate prematurely due to disagreements or may result in litigation between the partners;

• we may not be able to renew existing distributor agreements on acceptable terms;

• our distributors may not devote sufficient resources to the sale of products;

• our distributors may be unsuccessful in marketing our products;

• our existing relationships with distributors may preclude us from entering into additional future arrangements with other distributors; and

• we may not be able to negotiate future distributor agreements on acceptable terms.

Complying with regulations enforced by the FDA and other regulatory authorities is an expensive and time-consuming process, and any failure to comply could result in substantial penalties.

Our products are considered medical devices and are subject to extensive regulation in the U.S. and internationally. FDA regulations are wide ranging and govern, among other things:

• product design, development, manufacturing and testing;

• product labeling;

• product storage;

• pre-market clearance or approval;

• complaint handling and corrective actions;

• advertising and promotion; and

• product sales and distribution.

Our failure to comply with applicable regulatory requirements could result in enforcement action by the FDA or state agencies, which may include any of the following sanctions:

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• warning letters, fines, injunctions, consent decrees and civil penalties;

• repair, replacement, refunds, recall or seizure of our products;

• operating restrictions or partial suspension or total shutdown of production;

• refusing our requests for 510(k) clearance or pre-market approval of new products, new intended uses, or modifications to existing products;

• withdrawing clearance or pre-market approvals that have already been granted; and

• criminal prosecution.

If any of these events were to occur, they could harm our business. We must comply with facility registration and product listing requirements of the FDA and adhere to applicable Quality System regulations. The FDA enforces its Quality System regulations through periodic unannounced inspections. Our failure to take satisfactory corrective action in response to an adverse inspection or the failure to comply with applicable manufacturing regulations could result in enforcement action, and we may be required to find alternative manufacturers, which could be a long and costly process. Any FDA enforcement action could have a material adverse effect on us.

Before we can sell a new medical device in the U.S., or market a new use of or claim for an existing product we must obtain FDA clearance or approval, unless an exemption applies. Obtaining regulatory clearances or approvals can be a lengthy and time-consuming process. Even though the devices we market have obtained the necessary clearances from the FDA, we may be unable to maintain such clearances in the future. Furthermore, we may be unable to obtain the necessary clearances for new devices that we intend to market in the future. Our inability to maintain or obtain regulatory clearances or approvals could materially harm our business.

In addition, as part of the Dodd-Frank Wall Street Reform and Consumer Protection Act, the SEC adopted disclosure requirements regarding the use of certain minerals, known as conflict minerals, which are mined from the Democratic Republic of Congo and adjoining countries, as well as procedures regarding a manufacturer's efforts to identify and discourage the sourcing of such minerals and metals produced from those minerals. Additional reporting obligations are being considered by the European Union. The implementation of the existing U.S. requirements and any additional requirements in Europe could affect the sourcing and availability of metals used in the manufacture of a limited number of parts (if any) contained in our scanner products. For example, the implementation of these disclosure requirements may decrease the number of suppliers capable of supplying our needs for certain metals, thereby negatively affecting our ability to obtain products in sufficient quantities or at competitive prices. Our material sourcing is broad based and multi-tiered, and we may be unable to conclusively verify the origins for all metals used in our products. We may suffer financial and reputational harm if customers require, and we are unable to deliver, certification that our products are conflict free. Regardless, we will incur additional costs associated with compliance with these disclosure requirements, including time-consuming and costly efforts to determine the source of any conflict minerals used in our products.

If compliance with healthcare regulations becomes costly and difficult for our customers or for us, we may not be able to grow our business.

Participants in the healthcare industry are subject to extensive and frequently changing regulations under numerous laws administered by governmental entities at the federal, state and local levels, some of which are, and others of which may be, applicable to our business.  In response to perceived increases in health care costs in recent years, Congress passed health care reform legislation that President Obama signed into law in March 2010. This legislation contains many provisions designed to generate the revenues necessary to fund the coverage expansions. The most relevant of these provisions are those that impose fees or taxes on certain health-related industries, including medical device manufacturers. Effective January 1, 2013, as a medical device manufacturer, we were required to pay an excise tax on the price for which we sell our medical devices in the U.S. This tax applies to most medical devices, including our products, which could have a material, negative impact on our results of operations and our cash flows. The medical device excise tax ("MDET") is included in general and administrative expenses in the consolidated statements of operations. The excise tax expense was $7.1 million for the year ended December 31, 2013 and $1.3 million for the three months ended March 31, 2014.

46

During March 2014, Align had extensive discussions with the IRS and they informed us that our aligners are not subject to the MDET. As a result of these discussions, beginning in March 2014, we ceased expensing and paying the MDET for aligners, which reduced our first quarter general and administrative expense by approximately $0.5 million. In future quarters, we expect our general and administrative expense in relation to MDET to decrease by approximately $1.8 million per quarter based on current revenues. Additionally, we are in process of claiming a $8.0 million refund of MDET paid in 2013 and 2014; however, because this claim is subject to review and approval by the IRS, we have not recorded a receivable as the outcome of our audit is undeterminable. Any future changes in the applicability of the MDET as it applies to us or refunds of amounts previously paid will be recorded as an additional expense or a credit to the consolidated statement of operations in the period in which is becomes probable and reasonably estimable.

Furthermore, our healthcare provider customers are also subject to a wide variety of laws and regulations that could affect the nature and scope of their relationships with us. The healthcare market itself is highly regulated and subject to changing political, economic and regulatory influences. Regulations implemented pursuant to the Health Insurance Portability and Accountability Act ("HIPAA"), including regulations affecting the security and privacy of patient healthcare information held by healthcare providers and their business associates may require us to make significant and unplanned enhancements of software applications or services, result in delays or cancellations of orders, or result in the revocation of endorsement of our products and services by healthcare participants. The effect of HIPAA and newly enforced regulations on our business is difficult to predict, and there can be no assurance that we will adequately address the business risks created by HIPAA and its implementation or that we will be able to take advantage of any resulting business opportunities.

Extensive and changing government regulation of the healthcare industry may be expensive to comply with and exposes us to the risk of substantial government penalties.

In addition to medical device laws and regulations, numerous state and federal healthcare-related laws regulate our business, covering areas such as:

• storage, transmission and disclosure of medical information and healthcare records;

• prohibitions against the offer, payment or receipt of remuneration to induce referrals to entities providing healthcare services or goods or to induce the order, purchase or recommendation of our products; and

• the marketing and advertising of our products.

Complying with these laws and regulations could be expensive and time-consuming, and could increase our operating costs or reduce or eliminate certain of our sales and marketing activities or our revenues.

We face risks related to our international sales, including the need to obtain necessary foreign regulatory clearance or approvals.

Outside of North America, we currently sell our products in Europe, Asia Pacific, Latin America and the Middle East and may expand into other countries from time to time. For sales of our products outside the U.S., we are subject to foreign regulatory requirements that vary widely from country to country. The time required to obtain clearances or approvals required by other countries may be longer than that required for FDA clearance or approval, and requirements for such approvals may differ from FDA requirements. We may be unable to obtain regulatory approvals in one or more of the other countries in which we do business or in which we may do business in the future. We may also incur significant costs in attempting to obtain and maintain foreign regulatory approvals. If we experience delays in receipt of approvals to market our products outside of the U.S., or if we fail to receive these approvals, we may be unable to market our products or enhancements in international markets in a timely manner, if at all.

Our business exposes us to potential product liability claims, and we may incur substantial expenses if we are subject to product liability claims or litigation.

Medical devices involve an inherent risk of product liability claims and associated adverse publicity. We may be held liable if any product we develop or any product that uses or incorporates any of our technologies causes injury or is otherwise found unsuitable. Although we intend to continue to maintain product liability insurance, adequate insurance may not be available on acceptable terms, if at all, and may not provide adequate coverage against potential liabilities. A product liability claim, regardless of its merit or eventual outcome, could result in significant legal defense costs. These costs would have the effect of increasing our expenses and diverting management’s attention away from the operation of our business, and could harm our business.

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Historically, the market price for our common stock has been volatile.

The market price of our common stock could be subject to wide price fluctuations in response to various factors, many of which are beyond our control. The factors include:

• quarterly variations in our results of operations and liquidity;

• changes in recommendations by the investment community or in their estimates of our net revenues or operating results;

• speculation in the press or investment community concerning our business and results of operations;

• strategic actions by our competitors, such as product announcements or acquisitions;

• announcements of technological innovations or new products by us, our customers or competitors; and

• general economic market conditions.

In addition, the stock market in general, and the market for technology and medical device companies in particular, have experienced extreme price and volume fluctuations that have often been unrelated to or disproportionate to the operating performance of those companies. These broad market and industry factors may seriously harm the market price of our common stock, regardless of our operating performance. Historically, class action litigation is often brought against an issuing company following periods of volatility in the market price of a company’s securities.

Future sales of significant amounts of our common stock may depress our stock price.

A large percentage of our outstanding common stock is currently owned by a small number of significant stockholders.  These stockholders have sold in the past, and may sell in the future, large amounts of common stock over relatively short periods of time. Sales of substantial amounts of our common stock in the public market by our existing stockholders may adversely affect the market price of our common stock. Such sales could create public perception of difficulties or problems with our business and may depress our stock price.

If our goodwill or long-lived assets become impaired, we may be required to record a significant charge to earnings.

Under Generally Accepted Accounting Principles in the United States (“U.S. GAAP”), we review our goodwill and asset group for impairment when events or changes in circumstances indicate the carrying value may not be recoverable. Additionally, goodwill is required to be tested for impairment at least annually. The qualitative and quantitative analysis used to test goodwill are dependent upon various assumptions and reflect management’s best estimates. Changes in certain assumptions including revenue growth rates, discount rates, earnings multiples and future cash flows may cause a change in circumstances indicating that the carrying value of goodwill or the asset group may be impaired. We may be required to record a significant charge to earnings in the financial statements during the period in which any impairment of goodwill or asset group are determined.

Changes in, or interpretations of, accounting rules and regulations, could result in unfavorable accounting charges.

We prepare our consolidated financial statements in conformity with U.S. GAAP. These principles are subject to interpretation by the SEC and various bodies formed to interpret and create appropriate accounting policies. A change in these policies can have a significant effect on our reported results and may even retroactively affect previously reported transactions.  Our accounting policies that recently have been or may be affected by changes in the accounting rules are as follows:

• revenue recognition; and

• leases.

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If we fail to manage our exposure to global financial and securities market risk successfully, our operating results and financial statements could be materially impacted.

The primary objective of most of our investment activities is to preserve principal. To achieve this objective, a majority of our marketable investments are investment grade, liquid, fixed-income securities and money market instruments denominated in U.S. dollars. If the carrying value of our investments exceeds the fair value, and the decline in fair value is deemed to be other-than-temporary, we will be required to write down the value of our investments, which could materially harm our results of operations and financial condition. Moreover, the performance of certain securities in our investment portfolio correlates with the credit condition of the U.S. financial sector. In a current unstable credit environment, we might incur significant realized, unrealized or impairment losses associated with these investments.

We have adopted a shareholders rights’ plan to limit the possibility that we are acquired, which may mean that a transaction that shareholders are in favor of or are benefited by may be prevented.

Our Board of Directors has the authority to issue up to 5,000,000 shares of preferred stock and to determine the rights, preferences, privileges and restrictions of such shares without any further vote or action by our shareholders.  To date, our Board has designated 200,000 shares as Series A participating preferred stock in connection with our shareholder rights’ plan. The issuance of preferred stock under certain circumstances could have the effect of delaying or preventing an acquisition of Align or otherwise adversely affecting the rights of the holders of our stock. The shareholder rights’ plan may have the effect of rendering more difficult or discouraging an acquisition of our company which is deemed undesirable by our board of directors. The shareholder rights’ plan may cause substantial dilution to a person or group attempting to acquire us on terms or in a manner not approved by our board of directors, except pursuant to an offer conditioned on the negation, purchase or redemption of the rights issued under the shareholder rights’ plan.

Our effective tax rate may vary significantly from period to period.

Various internal and external factors may have favorable or unfavorable effects on our future effective tax rate. These factors include, but are not limited to, changes in tax laws, regulations and/or rates, non-deductible goodwill impairments, changing interpretations of existing tax laws or regulations, changes in the relative proportions of revenues and income before taxes in the various jurisdictions in which we operate that have differing statutory tax rates, the future levels of tax benefits of stock option deductions relating to incentive stock options and employee stock purchase plans, settlement of income tax audits, and changes in overall levels of pretax earnings. During the first quarter of 2013, we incurred a $40.7 million impairment of goodwill which was not deductible for tax purposes.

In June 2009, the Costa Rica Ministry of Foreign Trade, an agency of the Government of Costa Rica, granted a twelve year extension of various income tax incentives, which were previously granted in 2002. The incentive tax rates will expire in various years beginning in 2017. Under these incentives, all of the income in Costa Rica during these twelve year incentive periods is subject to reduced rates of Costa Rica income tax. In order to receive the benefit of these incentives, we must hire specified numbers of employees and maintain minimum levels of fixed asset investment in Costa Rica. If we do not fulfill these conditions for any reason, our incentive could lapse, and our income in Costa Rica would be subject to taxation at higher rates, which could have a negative impact on our operating results. The Costa Rica corporate income tax rate that would apply, absent the incentives, is 30% for 2014. As a result of these incentives, income taxes were reduced by $7.6 million and $6.0 million for three months ended March 31, 2014 and 2013, respectively, representing a benefit to diluted net income per share of $0.09 and $0.07 in 2014 and 2013, respectively. Our subsidiaries in Israel and Germany are under audit by the local tax authorities for calendar years 2006 through 2011 and 2007 through 2011, respectively.

ITEM 2.UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Not applicable.

ITEM 3.DEFAULTS UPON SENIOR SECURITIES

Not applicable.

ITEM 4.MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

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None

ITEM 6. EXHIBITS

(a) Exhibits:

Exhibit Number	Description	Filing	Date	Exhibit Number	Filed here with
31.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				*
31.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				*
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.				*
101.INS	XBRL Instance Document				*
101.SCH	XBRL Taxonomy Extension Schema Document				*
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document				*
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document				*
101.LAB	XBRL Taxonomy Extension Label Linkbase Document				*
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document				*

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	ALIGN TECHNOLOGY, INC.
May 1, 2014	By:	/S/    THOMAS M. PRESCOTT
		Thomas M. Prescott President and Chief Executive Officer
	By:	/S/    DAVID L. WHITE
		David L. White Chief Financial Officer

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EXHIBIT INDEX

Exhibit Number	Description	Filing	Date	Exhibit Number	Filed here with
31.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				*
31.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.				*
32.1	Certification of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.				*
101.INS	XBRL Instance Document				*
101.SCH	XBRL Taxonomy Extension Schema Document				*
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document				*
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document				*
101.LAB	XBRL Taxonomy Extension Label Linkbase Document				*
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document				*

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Thomas M. Prescott, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Align Technology, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2014

/s/ THOMAS M. PRESCOTT

Thomas M. Prescott

President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, David L. White, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Align Technology, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2014

/s/ DAVID L. WHITE

David L. White

Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER

PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Thomas M. Prescott, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Align Technology, Inc. on Form 10-Q for the quarter ended March 31, 2014 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Align Technology, Inc.

By:	/S/    THOMAS M. PRESCOTT
Name:	Thomas M. Prescott
Title:	President and Chief Executive Officer

Date: May 1, 2014

I, David L. White, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that the Quarterly Report of Align Technology, Inc. on Form 10-Q for the quarter ended March 31, 2014 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in such Quarterly Report on Form 10-Q fairly presents in all material respects the financial condition and results of operations of Align Technology, Inc.

By:	/S/   DAVID L. WHITE
Name:	David L. White
Title:	Chief Financial Officer

Date: May 1, 2014

XML

Total Estimated Annual Future Amortization Expense for Acquired Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Expected Amortization Expense [Line Items]
Remainder of 2014	$ 1,951
2015	2,600
2016	2,600
2017	2,600
2018	2,600
Thereafter	10,286
Net Carrying Value, ending balance	$ 22,637	$ 23,739

XML

Net Revenues by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Net revenues	$ 180,646	[1]	$ 153,580	[1]
United States
Segment Reporting Information [Line Items]
Net revenues	128,640	[1]	119,840	[1]
the Netherlands
Segment Reporting Information [Line Items]
Net revenues	38,843	[1]	26,947	[1]
Other international
Segment Reporting Information [Line Items]
Net revenues	$ 13,163	[1]	$ 6,793	[1]

[1] Net revenues are attributed to countries based on location of where revenue is recognized.

XML

Stock-based Compensation Stock-based Compensation Employee Stock Purchase Plan (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Expected term (in years)	1 year 2 months 12 days	1 year 2 months 12 days
Expected volatility	42.30%	46.70%
Risk-free interest rate	0.20%	0.20%
Expected dividends	0.00%	0.00%
Weighted average fair value at grant date (USD per Share)	$ 17.97	$ 11.17

XML

Long-Lived Assets by Geographic Area (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Segment Reporting Information [Line Items]
Long-lived assets	$ 79,093	[1]	$ 75,743	[1]
United States
Segment Reporting Information [Line Items]
Long-lived assets	65,141	[1]	61,439	[1]
MEXICO
Segment Reporting Information [Line Items]
Long-lived assets	6,272		6,291
the Netherlands
Segment Reporting Information [Line Items]
Long-lived assets	1,492		1,630
Other international
Segment Reporting Information [Line Items]
Long-lived assets	$ 6,188	[1]	$ 6,383	[1]

[1] Long-lived assets are attributed to countries based on entity that owns the asset.

XML

Summary of Nonvested Shares (Details) (Restricted Stock Units (RSUs), USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Restricted Stock Units (RSUs)
Number of Shares Underlying RSUs
Nonvested as of December 31, 2013	2,044
Granted	894
Vested and released	(470)
Forfeited	(49)
Nonvested as of March 31, 2014	2,419
Weighted Remaining Vesting Period
Nonvested as of March 31, 2014	1 year 10 months 21 days
Aggregate Intrinsic Value
Nonvested as of March 31, 2014	$ 125,272

XML

Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of Accrued Liabilities [Line Items]
Accrued payroll and benefits	$ 32,400	$ 43,029
Accrued sales rebate	9,851	10,100
Accrued sales tax and value added tax	6,230	6,215
Accrued warranty	3,048	3,104
Accrued sales and marketing expenses	4,689	3,893
Accrued accounts payable	5,622	4,053
Accrued professional fees	2,085	1,892
Accrued income taxes	408	1,205
Other	7,016	6,854
Total	$ 71,349	$ 80,345

XML

Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

Stock-based Compensation Expense

The stock-based compensation related to all of our stock-based awards and employee stock purchases for the three months ended March 31, 2014 and 2013 is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Cost of net revenues	$	844	$	580
Sales and marketing	2,667		1,011
General and administrative	4,050		3,927
Research and development	1,571		892
Total stock-based compensation	$	9,132	$	6,410

Stock Option Activity

Activity for the three month period ended March 31, 2014 under the stock option plans is set forth below (in thousands, except years and per share amounts):

	Stock Options Number of Shares Underlying Stock Options		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
					(in years )
Outstanding as of December 31, 2013	1,321
Granted	—
Exercised	(472	)
Cancelled or expired	(1	)
Outstanding as of March 31, 2014	848		$	15.47	3.56	$	30,814
Vested and expected to vest at March 31, 2014	846		$	15.46	3.56	$	30,755
Exercisable at March 31, 2014	783		$	14.96	3.53	$	28,857

^[1]

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:

	Three Months Ended March 31,
	2014			2013
Employee Stock Purchase Plan:
Expected term (in years)	1.2			1.2
Expected volatility	42.3		%	46.7		%
Risk-free interest rate	0.2		%	0.2		%
Expected dividends	—			—
Weighted average fair value at grant date	$	17.97		$	11.17

Restricted Stock Units (RSUs)

Summary Of Nonvested Shares

A summary of the RSU activity for the three months ended March 31, 2014 is as follows (in thousands, except years):

	Number of Shares Underlying RSU		Weighted Remaining Vesting Period	Aggregate Intrinsic Value
			(in years)
Nonvested as of December 31, 2013	2,044
Granted	894
Vested and released	(470	)
Forfeited	(49	)
Nonvested as of March 31, 2014	2,419		1.89	$	125,272

Market Performance Based Restricted Stock Units

Summary Of Nonvested Shares

The following table summarizes the MSU activity for the three months ended March 31, 2014 (in thousands, except years):

	Number of Shares Underlying MSU		Weighted Average Remaining Vesting Period	Aggregate Intrinsic Value
			(in years )
Nonvested as of December 31, 2013	307
Granted	243
Vested and released	(53	)
Forfeited	—
Nonvested as of March 31, 2014	497		2.13	$	25,766

[1] There were no stock options granted during the three months ended March 31, 2014 and 2013.

XML

Computation of Basic and Diluted Net Profit Per Share Attributable to Common Stock (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Numerator:
Net profit (loss)	$ 32,444	$ (41,983)
Denominator:
Weighted-average common shares outstanding, basic (in shares)	81,120	81,248
Dilutive effect of potential common stock (in shares)	1,697	0
Total shares, diluted	82,817	81,248
Net profit (loss) per share, basic	$ 0.40	$ (0.52)
Net profit (loss) per share, diluted	$ 0.39	$ (0.52)

XML

Minimum Future Lease Payments for Non-Cancelable Leases (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014
Disclosure Minimum Future Lease Payments For Non Cancelable Leases [Abstract]
Remainder of 2014	$ 6,960
2015	8,437
2016	7,717
2017	4,413
2018	1,539
Thereafter	500
Total minimum lease payments	$ 29,566

XML

Change in Carrying Value of Goodwill (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Clear Aligner [Member]
Goodwill [Roll Forward]
Balance as of December 31, 2013	$ 84,388	$ 85,362	$ 61,623
Adjustments 1			128
Balance as of March 31, 2014	$ 84,388	$ 85,362	$ 61,751

XML

Segments and Geographical Information - Additional Information (Details)	3 Months Ended
	Mar. 31, 2014 segment
Disclosure Segments And Geographical Information Additional Information [Abstract]
Number of reportable segments	2

XML

Summary of MSU Performance (Details) (Market Performance Based Restricted Stock Units, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Market Performance Based Restricted Stock Units
Number of Shares Underlying MSUs
Nonvested as of December 31, 2013	307
Granted	243
Vested and released	(53)
Forfeited	0
Nonvested as of March 31, 2014	497
Weighted Average Remaining Vesting Period
Nonvested as of March 31, 2014	2 years 1 month 17 days
Aggregate Intrinsic Value
Nonvested as of March 31, 2014	$ 25,766

XML

Balance Sheet Components

3 Months Ended

Mar. 31, 2014

Balance Sheet Components

Balance Sheet Components

Inventories

Inventories consist of the following (in thousands):

	March 31, 2014		December 31, 2013
Raw materials	$	5,962	$	5,172
Work in process	3,592		4,241
Finished goods	6,286		4,555
Total Inventories	$	15,840	$	13,968

Work in process includes costs to produce our clear aligner and intra-oral products. Finished goods primarily represent our intra-oral scanners and ancillary products that support our clear aligner products.

Accrued liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2014		December 31, 2013
Accrued payroll and benefits	$	32,400	$	43,029
Accrued sales rebates	9,851		10,100
Accrued sales tax and value added tax	6,230		6,215
Accrued sales and marketing expenses	4,689		3,893
Accrued accounts payable	5,622		4,053
Accrued warranty	3,048		3,104
Accrued professional fees	2,085		1,892
Accrued income taxes	408		1,205
Other accrued liabilities	7,016		6,854
Total Accrued Liabilities	$	71,349	$	80,345

Warranty

We regularly review the accrued warranty balances and update these balances based on historical warranty trends. Actual warranty costs incurred have not materially differed from those accrued; however, future actual warranty costs could differ from the estimated amounts.

Clear Aligner

We warrant our Invisalign products against material defects until the Invisalign case is complete. We accrue for warranty costs in cost of net revenues upon shipment of products. The amount of accrued estimated warranty costs is primarily based on historical experience as to product failures as well as current information on replacement costs.

Scanners

We warrant our scanners for a period of one year from the date of training and installation. We accrue for these warranty costs which includes materials and labor based on estimated historical repair costs. Extended service packages may be purchased for additional fees.

Warranty accrual as of March 31, 2014 and 2013 consists of the following activity (in thousands):

	Three Months Ended March 31,
	2014			2013
Balance at beginning of period	$	3,104		$	4,050
Charged to cost of net revenues	653			1,263
Actual warranty expenditures	(709		)	(1,184		)
Balance at end of period	$	3,048		$	4,129

XML

Stock-based Compensation - Additional Information (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Incentive Plan 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance	23,283,379
Amended And Restated 2005 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance	5,000,000
Employee Stock Purchase Plan 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available	2,400,000
Number of shares remaining	1,475,372
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	$ 81.7
Weighted average period of total unamortized cost (in years)	2 years 10 months 24 days
Market Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	14.1
Weighted average period of total unamortized cost (in years)	2 years 1 month 6 days
Market Performance Based Restricted Stock Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of granted market-performance based restricted stock units	2 years
Market Performance Based Restricted Stock Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of granted market-performance based restricted stock units	3 years
Percentage of market-performance based restricted stock units eligible to vest over the vesting period	150.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	0.6
Weighted average period of total unamortized cost (in years)	1 year
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unamortized compensation cost	$ 2.1
Weighted average period of total unamortized cost (in years)	8 months 12 days

XML

Summary of Financial Assets Measured at Fair Value on Recurring Basis (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	$ 322,606,000	$ 229,018,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	415,403,000	390,149,000
Fair Value, Measurements, Recurring [Member] | Israeli Severance Funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	2,274,000	2,193,000
Fair Value, Measurements, Recurring [Member] | Cash Equivalents | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	55,518,000	143,540,000
Fair Value, Measurements, Recurring [Member] | Cash Equivalents | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	32,995,000	15,398,000
Fair Value, Measurements, Recurring [Member] | Cash Equivalents | U.S. dollar dominated foreign corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	2,010,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	183,677,000	127,040,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	67,341,000	54,328,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	59,310,000	29,085,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | U.S. dollar dominated foreign corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	8,108,000	13,971,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	22,805,000	16,703,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	8,108,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	2,546,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	9,626,000	7,014,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | US Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	22,805,000	16,703,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	13,941,000	5,939,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	138,929,000	101,978,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	45,836,000	23,313,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | U.S. dollar dominated foreign corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	13,768,000	19,495,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	31,084,000	38,118,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	13,768,000	19,495,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	20,612,000	6,919,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	7,128,000	8,331,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | US Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		6,919,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	20,501,000	5,802,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	76,130,000	150,459,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Israeli Severance Funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash Equivalents | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	55,518,000	143,540,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Cash Equivalents | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | U.S. dollar dominated foreign corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | US Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Short-term Investments | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | Agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	20,612,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | US Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		6,919,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) | Long-term Investments | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Assets, Fair Value Disclosure	339,273,000	239,690,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Israeli Severance Funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Other assets	2,274,000	2,193,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Cash Equivalents | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Cash Equivalents | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	32,995,000	15,398,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Cash Equivalents | U.S. dollar dominated foreign corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Cash equivalents	2,010,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | Commercial paper
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	67,341,000	54,328,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	59,310,000	29,085,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | U.S. dollar dominated foreign corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		13,971,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	8,108,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	2,546,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	9,626,000	7,014,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | US Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	22,805,000	16,704,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Short-term Investments | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	13,941,000	5,938,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	45,836,000	23,313,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | Agency bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	31,084,000	38,118,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | Foreign bonds
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	13,768,000	19,495,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	7,128,000	8,331,000
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | US Government Agency Bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments		0
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) | Long-term Investments | Asset-backed Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Investments	$ 20,501,000	$ 5,802,000

XML

Short-Term and Long-Term Marketable Securities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Total available for sale short-term and long-term marketable securities	$ 322,606,000	$ 229,018,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	183,603,000	126,992,000
Gross Unrealized Gains	98,000	55,000
Gross Unrealized Losses	(24,000)	(7,000)
Total available for sale short-term and long-term marketable securities	183,677,000	127,040,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Commercial paper
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	67,332,000	54,318,000
Gross Unrealized Gains	10,000	10,000
Gross Unrealized Losses	(1,000)	0
Total available for sale short-term and long-term marketable securities	67,341,000	54,328,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	59,282,000	29,079,000
Gross Unrealized Gains	42,000	10,000
Gross Unrealized Losses	(14,000)	(4,000)
Total available for sale short-term and long-term marketable securities	59,310,000	29,085,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Agency bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,794,000	16,693,000
Gross Unrealized Gains	17,000	10,000
Gross Unrealized Losses	(6,000)	0
Total available for sale short-term and long-term marketable securities	22,805,000	16,703,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,934,000	5,937,000
Gross Unrealized Gains	8,000	2,000
Gross Unrealized Losses	(1,000)	0
Total available for sale short-term and long-term marketable securities	13,941,000	5,939,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,613,000	7,006,000
Gross Unrealized Gains	13,000	11,000
Gross Unrealized Losses	0	(3,000)
Total available for sale short-term and long-term marketable securities	9,626,000	7,014,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | U.S. dollar dominated foreign corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	8,102,000	13,959,000
Gross Unrealized Gains	8,000	12,000
Gross Unrealized Losses	(2,000)	0
Total available for sale short-term and long-term marketable securities	8,108,000	13,971,000
Fair Value, Measurements, Recurring [Member] | Short-term Investments | US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,546,000
Total available for sale short-term and long-term marketable securities	2,546,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	138,917,000	101,973,000
Gross Unrealized Gains	89,000	62,000
Gross Unrealized Losses	(77,000)	(57,000)
Total available for sale short-term and long-term marketable securities	138,929,000	101,978,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	45,844,000	23,308,000
Gross Unrealized Gains	41,000	14,000
Gross Unrealized Losses	(49,000)	(9,000)
Total available for sale short-term and long-term marketable securities	45,836,000	23,313,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Agency bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	31,077,000	38,138,000
Gross Unrealized Gains	11,000	1,000
Gross Unrealized Losses	(4,000)	(21,000)
Total available for sale short-term and long-term marketable securities	31,084,000	38,118,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,501,000	5,800,000
Gross Unrealized Gains	5,000	4,000
Gross Unrealized Losses	(5,000)	(2,000)
Total available for sale short-term and long-term marketable securities	20,501,000	5,802,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,114,000	8,326,000
Gross Unrealized Gains	15,000	13,000
Gross Unrealized Losses	(1,000)	(8,000)
Total available for sale short-term and long-term marketable securities	7,128,000	8,331,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | U.S. dollar dominated foreign corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,783,000	19,485,000
Gross Unrealized Gains	2,000	27,000
Gross Unrealized Losses	(17,000)	(17,000)
Total available for sale short-term and long-term marketable securities	13,768,000	19,495,000
Fair Value, Measurements, Recurring [Member] | Long-term Investments | US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	20,598,000	6,916,000
Gross Unrealized Gains	15,000	3,000
Gross Unrealized Losses	(1,000)	0
Total available for sale short-term and long-term marketable securities	$ 20,612,000	$ 6,919,000

XML

Subsequent Events (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	Apr. 28, 2014	Apr. 23, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]
Repurchase of common stock, common stock authorized		$ 300
Stock repurchase program, authorized amount for next twelve months		100
Accelerated share repurchase, contracted amount of repurchase	70.0
Accelerated share repurchase, initial delivery of shares, value	$ 1.0

XML

Stock-Based Compensation Expense Related to All Stock-Based Awards and Employee Stock Purchases (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 9,132	$ 6,410
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	844	580
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,667	1,011
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	4,050	3,927
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 1,571	$ 892

XML

Marketable Securities and Fair Value Measurements Additional Information (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Maturity Period Used To Classify Investments		2 years
Marketable Securities, Weighted Average Remaining Maturity		11 months		10 months
Asset Impairment Charges	$ 26,300	$ 0	$ 26,320
Impairment of goodwill		$ 0	$ 40,693

XML

Marketable Securities and Fair Value Measurements Available For Sale Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Due in one year or less	$ 183,677	$ 127,040
Due in one year to 27 months	138,929	101,978
Total available for sale short-term and long-term marketable securities	$ 322,606	$ 229,018

XML

Marketable Securities and Fair Value Measurements

3 Months Ended

Mar. 31, 2014

Notes To Financial Statements [Abstract]

Marketable Securities and Fair Value Measurements

Marketable Securities and Fair Value Measurements

As of March 31, 2014 and December 31, 2013, the estimated fair value of our short-term and long-term marketable securities, classified as available for sale, are as follows (in thousands):

Short-term

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	67,332	$	10	$	(1	)	$	67,341
Corporate bonds	59,282		42		(14		)	59,310
U.S. government agency bonds	22,794		17		(6		)	22,805
Asset-backed securities	13,934		8		(1		)	13,941
Municipal securities	9,613		13		—			9,626
U.S. dollar dominated foreign corporate bonds	8,102		8		(2		)	8,108
U.S. government treasury bonds	2,546		—		—			2,546
Total Marketable Securities, Short-Term	$	183,603	$	98	$	(24	)	$	183,677

Long-term

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds	$	45,844	$	41	$	(49	)	$	45,836
U.S. government agency bonds	31,077		11		(4		)	31,084
Asset-backed securities	20,501		5		(5		)	20,501
U.S. government treasury bonds	20,598		15		(1		)	20,612
U.S. dollar dominated foreign corporate bonds	13,783		2		(17		)	13,768
Municipal securities	7,114		15		(1		)	7,128
Total Marketable Securities, Long-Term	$	138,917	$	89	$	(77	)	$	138,929

Short-term

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds	$	29,079	$	10	$	(4	)	$	29,085
Commercial paper	54,318		10		—			54,328
U.S. government agency bonds	16,693		10		—			16,703
U.S. dollar dominated foreign corporate bonds	13,959		12		—			13,971
Municipal securities	7,006		11		(3		)	7,014
Asset-backed securities	5,937		2		—			5,939
Total Marketable Securities, Short-Term	$	126,992	$	55	$	(7	)	$	127,040

Long-term

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	38,138	$	1	$	(21	)	$	38,118
Corporate bonds	23,308		14		(9		)	23,313
U.S. dollar dominated foreign corporate bonds	19,485		27		(17		)	19,495
Municipal securities	8,326		13		(8		)	8,331
U.S. government treasury bonds	6,916		3		—			6,919
Asset-backed securities	5,800		4		(2		)	5,802
Total Marketable Securities, Long-Term	$	101,973	$	62	$	(57	)	$	101,978

 For the three months ended March 31, 2014 and 2013, realized gains were immaterial. Unrealized gains and losses for our available for sale securities as of March 31, 2014 and December 31, 2013 were also immaterial. Cash and cash equivalents are not included in the table above as the gross unrealized gains and losses are not material. We have no material short-term or long-term investments that have been in a continuous unrealized loss position for greater than twelve months as of March 31, 2014 and December 31, 2013. Amounts reclassified to earnings from accumulated other comprehensive income related to unrealized gain or losses were immaterial for the three months ended March 31, 2014 and 2013.

Our fixed-income securities investment portfolio consists of corporate bonds, U.S. dollar dominated foreign corporate bonds, commercial paper, municipal securities, U.S. government agency bonds and asset-backed securities that have a maximum maturity of two years. The securities that we invest in are generally deemed to be low risk based on their credit ratings from the major rating agencies. The longer the duration of these securities, the more susceptible they are to changes in market interest rates and bond yields. As interest rates increase, those securities purchased at a lower yield show a mark-to-market unrealized loss. The unrealized losses are due primarily to changes in credit spreads and interest rates. We expect to realize the full value of all these investments upon maturity or sale. The weighted average remaining duration of these securities was approximately 11 months and 10 months as of March 31, 2014 and December 31, 2013, respectively.

As the carrying value approximates the fair value for our short-term and long-term marketable securities shown in the tables above, the following table summarizes the fair value of our short-term and long-term marketable securities classified by maturity as of March 31, 2014 and December 31, 2013 (in thousands):

	March 31,		December 31,
	2014		2013
Due in one year or less	$	183,677	$	127,040
Due in one year to 27 months	138,929		101,978
Total available for sale short-term and long-term marketable securities	$	322,606	$	229,018

Fair Value Measurements

We measure the fair value of our cash equivalents and marketable securities as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We use the GAAP fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. This hierarchy requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value:

Level 1 — Quoted (unadjusted) prices in active markets for identical assets or liabilities.

Our Level 1 assets consist of money market funds and U.S. government treasury bonds. We did not hold any Level 1 liabilities as of March 31, 2014 or December 31, 2013.

Level 2 — Observable inputs other than quoted prices included in Level 1, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the asset or liability.

Our Level 2 assets consist of commercial paper, corporate bonds, U.S. dollar dominated foreign corporate bonds, U.S. government agency bonds, municipal securities, asset-backed securities, U.S. government treasury bonds and our Israeli funds that are mainly invested in insurance policies. We obtain fair values for Level 2 investments from our asset manager for each of our portfolios. Our custody bank and asset managers independently use professional pricing services to gather pricing data which may include quoted market prices for identical or comparable financial instruments, or inputs other than quoted prices that are observable either directly or indirectly, and we are ultimately responsible for these underlying estimates.

We did not hold any Level 2 liabilities as of March 31, 2014 or December 31, 2013.

Level 3 — Unobservable inputs to the valuation methodology that are supported by little or no market activity and that are significant to the measurement of the fair value of the assets or liabilities. Level 3 assets and liabilities include those whose fair value measurements are determined using pricing models, discounted cash flow methodologies or similar valuation techniques, as well as significant management judgment or estimation.

We did not hold any Level 3 assets or liabilities as of March 31, 2014 or December 31, 2013.

Non-Recurring Fair Value Measurements

During the three months ended March 31, 2013, we recorded an impairment charge to our long-lived assets and goodwill of $26.3 million and $40.7 million, respectively, related to our Scanner and Services ("Scanner") reporting unit, formerly referred to as Scanner and CAD/CAM Services ("SCCS"), as an event occurred and circumstances changed that led us to perform an impairment analysis prior to our annual test which required us to determine the fair value of the Scanner reporting unit (Refer to Note 5). These fair value measurements were calculated using unobservable inputs, using the income approach which is classified as Level 3 within the fair value hierarchy. Inputs for the income approach includes the amount and timing of future cash flows based on our most recent operational budgets, strategic plans, terminal growth rates assumptions and other estimates.

Recurring Fair Value Measurements

The following table summarizes our financial assets measured at fair value on a recurring basis as of March 31, 2014 and December 31, 2013 (in thousands):

Description	Balance as of March 31, 2014		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)
Cash equivalents:
Money market funds	$	55,518	$	55,518	$	—
Commercial paper	32,995		—		32,995
Corporate bonds	2,010		—		2,010
Short-term investments:
Commercial paper	67,341		—		67,341
Corporate bonds	59,310		—		59,310
U.S. government agency bonds	22,805		—		22,805
Asset-backed securities	13,941		—		13,941
Municipal securities	9,626		—		9,626
U.S. dollar dominated foreign corporate bonds	8,108		—		8,108
U.S. government treasury bonds	2,546		—		2,546
Long-term investments:
Corporate bonds	45,836		—		45,836
U.S. government agency bonds	31,084		—		31,084
Asset-backed securities	20,501		—		20,501
U.S. government treasury bonds	20,612		20,612		—
U.S. dollar dominated foreign corporate bonds	13,768		—		13,768
Municipal securities	7,128		—		7,128
Other assets:
Israeli funds	2,274		—		2,274
	$	415,403	$	76,130	$	339,273

Description	Balance as of December 31, 2013		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)
Cash equivalents:
Money market funds	$	143,540	$	143,540	$	—
Commercial paper	15,398		—		15,398
Short-term investments:
Commercial paper	54,328		—		54,328
Corporate bonds	29,085		—		29,085
U.S. dollar denominated foreign corporate bonds	13,971		—		13,971
Municipal securities	7,014		—		7,014
U.S. government agency bonds	16,703		—		16,704
Asset-backed securities	5,939		—		5,938
Long-term investments:
U.S. government agency bonds	38,118		—		38,118
Corporate bonds	23,313		—		23,313
U.S. dollar denominated foreign corporate bonds	19,495		—		19,495
U.S. government treasury bonds	6,919		6,919		—
Municipal securities	8,331		—		8,331
Asset-backed securities	5,802		—		5,802
Other assets:
Israeli funds	2,193		—		2,193
	$	390,149	$	150,459	$	239,690

XML

Inventories (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Schedule of Inventory [Line Items]
Inventory, Raw Materials, Net of Reserves	$ 5,962	$ 5,172
Inventory, Work in Process, Net of Reserves	3,592	4,241
Inventory, Finished Goods, Net of Reserves	6,286	4,555
Inventories	$ 15,840	$ 13,968

XML

Goodwill and Acquired Intangible Assets Impairment of goodwill (Details) (USD $)	1 Months Ended	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Goodwill [Line Items]
Impairment of goodwill		$ 0	$ 40,693,000
Asset Impairment Charges	26,300,000	0	26,320,000
Scanners and CAD/CAM Services
Goodwill [Line Items]
Asset Impairment Charges	19,300,000
Property, Plant, Equipment [Member]
Goodwill [Line Items]
Impairment of fixed assets	$ 7,000,000

XML

Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 180,646	[1]	$ 153,580	[1]
Gross profit	137,251		112,849
Clear Aligner [Member]
Segment Reporting Information [Line Items]
Gross profit	133,083		109,327
Invisalign Full [Member]
Segment Reporting Information [Line Items]
Revenue	138,133		112,780
Invisalign ExpressLite [Member]
Segment Reporting Information [Line Items]
Revenue	19,625		16,083
Invisalign Non-Case Revenues [Member]
Segment Reporting Information [Line Items]
Revenue	10,481		12,709
Scanners and CAD/CAM Services
Segment Reporting Information [Line Items]
Revenue	12,407		12,008
Gross profit	$ 4,168		$ 3,522

[1] Net revenues are attributed to countries based on location of where revenue is recognized.

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Net revenues	$ 180,646	[1]	$ 153,580	[1]
Cost of net revenues	43,395		40,731
Gross profit	137,251		112,849
Operating expenses:
Sales and marketing	52,888		42,281
General and administrative	29,179		30,348
Research and development	13,380		11,282
Impairment of goodwill	0		40,693
Asset Impairment Charges	0		26,320
Total operating expenses	95,447		150,924
Profit from operations	41,804		(38,075)
Interest and other income (expense), net	601		(988)
Net profit before provision for income taxes	42,405		(39,063)
Provision for income taxes	9,961		2,920
Net profit (loss)	$ 32,444		$ (41,983)
Net profit (loss) per share:
Basic (in usd per share)	$ 0.40		$ (0.52)
Diluted (in usd per share)	$ 0.39		$ (0.52)
Shares used in computing net profit (loss) per share:
Basic (in shares)	81,120		81,248
Diluted (in shares)	82,817		81,248
Effective Income Tax Rate, Continuing Operations	23.50%		(7.50%)

[1] Net revenues are attributed to countries based on location of where revenue is recognized.

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Activity Under Stock Option Plans (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Number of Shares Underlying Stock Options
Outstanding as of December 31, 2013	1,321
Granted	0
Exercised	(472)
Cancelled or expired	(1)
Outstanding as of March 31, 2014	848
Vested and expected to vest at March 31, 2014	846
Exercisable at March 31, 2014	783
Weighted Average Exercise Price per Share
Outstanding as of March 31, 2014	$ 15.47
Vested and expected to vest at March 31, 2013 (usd per share)	$ 15.46
Exercisable at March 31, 2013 (usd per share)	$ 14.96
Weighted Average Remaining Contractual Term
Outstanding as of March 31, 2014	3 years 6 months 22 days
Vested and expected to vest at March 31, 2014	3 years 6 months 22 days
Exercisable at March 31, 2014	3 years 6 months 11 days
Aggregate Intrinsic Value
Outstanding as of March 31, 2014	$ 30,814
Vested and expected to vest at March 31, 2014	30,755
Exercisable at March 31, 2014	$ 28,857

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net profit (loss)	$ 32,444	$ (41,983)
Adjustments to reconcile net profit to net cash provided by operating activities:
Deferred taxes	12,769	931
Depreciation, Depletion and Amortization	4,776	4,944
Stock-based compensation	9,132	6,410
Excess tax benefit from share-based payment arrangements	(13,568)	(7,739)
Impairment of goodwill	0	40,693
Asset Impairment Charges	0	26,320
Other Noncash Income (Expense)	1,977	(444)
Changes in assets and liabilities, net of acquired assets and liabilities:
Accounts receivable	(13,939)	(10,002)
Inventories	(1,870)	(320)
Prepaid expenses and other assets	(1,790)	(586)
Accounts payable	265	1,611
Accrued and other long-term liabilities	(15,286)	(7,941)
Deferred revenues	3,083	(1,476)
Net cash provided by operating activities	17,993	10,418
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(4,996)	(5,608)
Purchase of marketable securities	(157,919)	(3,282)
Maturities of marketable securities	53,137	4,366
Proceeds from Sale of Available-for-sale Securities	10,564	0
Other assets	(133)	1,079
Net cash used in investing activities	(99,347)	(3,445)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock	11,946	13,268
Common stock repurchase	0	(2,438)
Excess tax benefit from share-based payment arrangements	13,568	7,739
Employees' taxes paid upon the vesting of restricted stock units	(4,453)	(3,141)
Other financing activities	0	(5)
Net cash provided by financing activities	21,061	15,423
Effect of foreign exchange rate changes on cash and cash equivalents	106	(37)
Net increase (decrease) in cash and cash equivalents	(60,187)	22,359
Cash and cash equivalents, beginning of the period	242,953	306,386
Cash and cash equivalents, end of the period	$ 182,766	$ 328,745

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Warranty Accrual Activity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 3,104	$ 4,050
Charged to cost of revenues	653	1,263
Actual warranty expenditures	(709)	(1,184)
Balance at end of period	$ 3,048	$ 4,129

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Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2014

Schedule of Inventories

Inventories consist of the following (in thousands):

	March 31, 2014		December 31, 2013
Raw materials	$	5,962	$	5,172
Work in process	3,592		4,241
Finished goods	6,286		4,555
Total Inventories	$	15,840	$	13,968

Schedule of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2014		December 31, 2013
Accrued payroll and benefits	$	32,400	$	43,029
Accrued sales rebates	9,851		10,100
Accrued sales tax and value added tax	6,230		6,215
Accrued sales and marketing expenses	4,689		3,893
Accrued accounts payable	5,622		4,053
Accrued warranty	3,048		3,104
Accrued professional fees	2,085		1,892
Accrued income taxes	408		1,205
Other accrued liabilities	7,016		6,854
Total Accrued Liabilities	$	71,349	$	80,345

Warranty Accrual

arranty accrual as of March 31, 2014 and 2013 consists of the following activity (in thousands):

	Three Months Ended March 31,
	2014			2013
Balance at beginning of period	$	3,104		$	4,050
Charged to cost of net revenues	653			1,263
Actual warranty expenditures	(709		)	(1,184		)
Balance at end of period	$	3,048		$	4,129

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Business Combinations (Details) (USD $)			0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Apr. 30, 2013 ICA Holdings Pty Limited [Member]
Business Acquisition [Line Items]
Payments to acquire business			$ 8,600,000
Assets acquired			7,400,000
Liabilities assumed			2,400,000
Goodwill	$ 84,388,000	$ 85,362,000	$ 3,600,000

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Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2014

Notes To Financial Statements [Abstract]

Schedule of Future Lease Payments

As of March 31, 2014, minimum future lease payments for non-cancelable operating leases are as follows (in thousands):

Fiscal Year Ending December 31,	Operating leases
Remainder of 2014	$	6,960
2015	8,437
2016	7,717
2017	4,413
2018	1,539
Thereafter	500
Total minimum future lease payments	$	29,566

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2014

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Basis of presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, or “Align”) in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") and contain all adjustments, including normal recurring adjustments, necessary to present fairly our results of operations for the three months ended March 31, 2014 and 2013, our comprehensive income (loss) for the three months ended March 31, 2014 and 2013, our financial position as of March 31, 2014 and our cash flows for the three months ended March 31, 2014 and 2013. The Condensed Consolidated Balance Sheet as of December 31, 2013 was derived from the December 31, 2013 audited financial statements. Net revenues by geographic area for prior period amounts in Note 12 have been reclassified to conform with the current period presentation. These reclassifications had no impact on our financial position for the three months ended March 31, 2014 and 2013.

The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014 or any other future period, and we make no representations related thereto. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Quantitative and Qualitative Disclosures About Market Risk” and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in our Annual Report on Form 10-K for the year ended December 31, 2013.

Use of estimates

The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States of America (“U.S.”) requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to the fair values of financial instruments, long-lived assets and goodwill, useful lives of intangible assets and property and equipment, stock-based compensation, income taxes, and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.

Recent Accounting Pronouncements

In July 2013, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-11, "Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force)." The amendments in this ASU provide guidance on the financial statements presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. An unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward with certain exceptions, in which case such an unrecognized tax benefit should be presented in the financial statements as a liability. The amendments in this ASU do not require new recurring disclosures and are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this standard in the first quarter of 2014 had the effect of reducing our accruals for uncertain tax positions by $8.4 million, with an offsetting reduction in our long term deferred tax assets, but had no effect on net income.

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net profit (loss)	$ 32,444	$ (41,983)
Foreign currency translation adjustments	106	(55)
Change in unrealized gains (losses) on available-for-sale securities, net of tax	42	3
Net change in accumulated other comprehensive income (losses)	148	(52)
Other comprehensive income (loss)	$ 32,592	$ (42,035)

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Net Profit Per Share

3 Months Ended

Mar. 31, 2014

Net Profit Per Share

Net Income (Loss) Per Share

Basic net income (loss) per share is computed using the weighted average number of shares of common stock outstanding during the period. Diluted net income per share is computed using the weighted average number of shares of common stock, adjusted for the dilutive effect of potential common stock. Potential common stock, computed using the treasury stock method, includes stock options, RSU, MSU and ESPP.

The following table sets forth the computation of basic and diluted net income (loss) per share attributable to common stock (in thousands, except per share amounts):

	Three Months Ended, March 31
	2014		2013
Numerator:
Net income (loss)	$	32,444	$	(41,983	)
Denominator:
Weighted-average common shares outstanding, basic	81,120		81,248
Dilutive effect of potential common stock	1,697		—
Total shares, diluted	82,817		81,248
Net income (loss) per share, basic	$	0.40	$	(0.52	)
Net income (loss) per share, diluted	$	0.39	$	(0.52	)

For the three months ended March 31, 2014, the anti-dilutive affect from stock options, RSU, MSU and ESPP was not material.

For the three months ended March 31, 2013, stock options, RSU, MSU and ESPP totaling 1.8 million of potentially dilutive shares have been excluded from the total diluted shares because there was a net loss during the period.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 25, 2014
Document Information [Line Items]
Trading Symbol	ALGN
Entity Registrant Name	ALIGN TECHNOLOGY INC
Entity Central Index Key	0001097149
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		81,635,404

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Segments and Geographical Information

3 Months Ended

Mar. 31, 2014

Segments and Geographical Information

Segments and Geographical Information

Segment Information

Operating segments are defined as components of an enterprise for which separate financial information is available that is evaluated regularly by the Chief Operating Decision Maker (“CODM”), or decision-making group, in deciding how to allocate resources and in assessing performance. Our CODM is our Chief Executive Officer. We report segment information based on the management approach. The management approach designates the internal reporting used by CODM for decision making and performance assessment as the basis for determining our reportable segments. The performance measures of our reportable segments include net revenues and gross profit.

We have grouped our operations into two reportable segments which are also our reporting units: Clear Aligner segment and Scanner segment.

• Our Clear Aligner segment consists of our Invisalign system which includes Invisalign Full, Express/Lite, Teen, Assist, Vivera retainers, along with our training and ancillary products for treating malocclusion.

• Our Scanner segment consists of intra-oral scanning systems and additional services available with the intra-oral scanners that provide digital alternatives to the traditional cast models. This segment includes our iTero scanner and OrthoCAD services.

These reportable operating segments are based on how our CODM views and evaluates our operations as well as allocation of resources (in thousands):

	For the Three Months Ended March 31,
Net Revenues	2014		2013
Clear Aligner
Invisalign Full Products	$	138,133	$	112,780
Invisalign Express/Lite Products	19,625		16,083
Invisalign non-case revenues	10,481		12,709
Scanner
Scanners and Services	12,407		12,008
Total net revenues	$	180,646	$	153,580
Gross profit
Clear Aligner	$	133,083	$	109,327
Scanners and Services	4,168		3,522
Total gross profit	$	137,251	$	112,849

Geographical Information

Net revenues and tangible long-lived assets are presented below by geographic area (in thousands):

	For the Three Months Ended March 31,
	2014		2013
Net revenues: (1)
U.S.	$	128,640	$	119,840
the Netherlands	38,843		26,947
Other international	13,163		6,793
Total net revenues	$	180,646	$	153,580

⁽¹⁾ Net revenues are attributed to countries based on location of where revenue is recognized.

	March 31,		December 31,
	2014		2013
Long-lived assets:(2)
United States	$	65,141	$	61,439
Mexico	6,272		6,291
the Netherlands	1,492		1,630
Other International	6,188		6,383
Total long-lived assets	$	79,093	$	75,743

⁽²⁾ Long-lived assets are attributed to countries based on entity that owns the asset.

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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 182,766	$ 242,953
Marketable securities, short-term	183,677	127,040
Accounts receivable, net of allowances for doubtful accounts and returns of $1,798 and $1,733, respectively	126,183	113,250
Inventories	15,840	13,968
Prepaid expenses and other current assets	43,711	47,465
Total current assets	552,177	544,676
Marketable securities, long-term	138,929	101,978
Property, plant and equipment, net	79,093	75,743
Goodwill	84,388	85,362
Deferred tax assets	22,739	15,766
Other assets	8,315	8,622
Total assets	885,641	832,147
Current liabilities:
Accounts payable	18,506	17,718
Accrued liabilities	71,349	80,345
Deferred revenues	81,000	77,275
Total current liabilities	170,855	175,338
Other long-term liabilities	18,033	22,839
Total liabilities	188,888	198,177
Commitments and contingencies (Note 7)
Stockholders' equity:
Preferred stock, $0.0001 par value (5,000 shares authorized; none issued)	0	0
Common stock, $0.0001 par value (200,000 shares authorized; 81,632 and 80,583 issued and outstanding at 2014 and 2013, respectively)	8	8
Additional paid-in capital	759,768	729,578
Accumulated other comprehensive income (loss), net	442	294
Accumulated deficit	(63,465)	(95,910)
Total stockholders' equity	696,753	633,970
Total liabilities and stockholders' equity	$ 885,641	$ 832,147

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Credit Facilities

3 Months Ended

Mar. 31, 2014

Notes To Financial Statements [Abstract]

Credit Facilities

Credit Facilities

On March 22, 2013, we entered into a credit facility with Wells Fargo Bank. The credit facility provides for a $50.0 million revolving line of credit, with a $10.0 million letter of credit sublimit, and has a maturity date on March 22, 2016. The credit facility also requires us to maintain a minimum unrestricted cash balance of $50.0 million and comply with specific financial conditions and performance requirements. The loans bear interest, at our option, at a fluctuating rate per annum equal to the daily one-month adjusted LIBOR rate plus a spread of 1.75% or an adjusted LIBOR rate (based on one, three, six or twelve-month interest periods) plus a spread of 1.75%. As of March 31, 2014, we had no outstanding borrowings under this credit facility and were in compliance with the conditions and performance requirements.

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Goodwill and Acquired Intangible Assets

3 Months Ended

Mar. 31, 2014

Goodwill and Acquired Intangible Assets

Goodwill and Long-lived Assets

Goodwill

The change in the carrying value of goodwill for the three months ended March 31, 2014 by our reportable segments, which are also our reporting units, is as follows (in thousands):

	Clear Aligner
Balance as of December 31, 2013	$	61,623
Adjustments 1	128
Balance as of March 31, 2014	$	61,751

¹ The adjustments to goodwill during the three months ended March 31, 2014 were due to foreign currency translation.

The goodwill balance is entirely attributable to our Clear Aligner reporting unit. During the fourth quarter of fiscal 2013, we performed the annual goodwill impairment testing and found no impairment events as the fair value of our Clear Aligner reporting unit was significantly in excess of the carrying value.

Impairment of Goodwill in 2013

We evaluate our goodwill for impairment at least annually on November 30th or more frequently if indicators are present, an event occurs or circumstances change that suggest an impairment may exist and that it would more likely than not reduce the fair value of the reporting unit below its carrying amount. During March 2013, changes in the competitive environment for intra-oral scanners, including announcements from our competitors of new low-priced scanners targeted at orthodontists and general practitioner dentists in North America, that caused us to lower our expectations for growth and profitability for our Scanner reporting unit. As a result, we determined that goodwill related only to our Scanner reporting unit should be tested for impairment as of March 2013 due to these facts and circumstances which would more likely than not reduce the fair value of our Scanner reporting unit below its carrying amount. There was no triggering event related to our Clear Aligner goodwill.

We performed a step one analysis for our Scanner reporting unit which consists of a comparison of the fair value of the Scanner reporting unit against its carrying amount, including the goodwill allocated to it. In deriving the fair value of the Scanner reporting unit, we utilized the income approach which is classified as Level 3 within the fair value hierarchy. This approach provides an estimated fair value based on discounted expected future cash flows, which are based on management's estimates of revenue growth rates and operating margins, taking into consideration industry and market conditions. The discount rate used is based on a weighted average cost of capital adjusted for the relevant risk associated with the characteristics of the business and the projected cash flows.

As a result of our step one analysis, we concluded that the fair value of the Scanner reporting unit was less than its carrying value; therefore, we proceeded to step two of the goodwill impairment analysis. Step two of the goodwill impairment analysis measures the impairment charge by allocating the reporting unit's fair value to all of the assets and liabilities of the reporting unit in a hypothetical analysis that calculates the implied fair value of goodwill in the same manner as if the reporting unit was being acquired in a business combination. This allocation process was performed only for the purposes of measuring the goodwill impairment and not to adjust the carrying values of the recognized tangible assets and liabilities. Any excess of the carrying value of the reporting unit's goodwill over the implied fair value of the reporting unit's goodwill is recorded as an impairment loss. We use a discounted cash flow ("DCF") approach, utilizing the harvest model, to estimate the fair value of a reporting unit which we believe is the most reliable indicator of fair value of this business, and is most consistent with the approach a market place participant would use. Based on our analysis, there was no implied goodwill for the Scanner reporting unit; therefore, we recorded a goodwill impairment charge of $40.7 million in the three months ended March 31, 2013, which represents the remaining goodwill balance in the Scanner reporting unit. None of the goodwill impairment charge was deductible for tax purposes.

Long-lived Assets

Impairment of Long-lived Assets in 2013

We amortize our intangible assets over their estimated useful lives. We evaluate long-lived assets, which includes property, plant and equipment and intangible assets, for impairment whenever events or changes in circumstances indicate the carrying value of an asset may not be recoverable. The carrying value is not recoverable if it exceeds the undiscounted cash flows resulting from the use of the asset and its eventual disposition. Our estimates of future cash flows attributable to our long-lived assets require significant judgment based on our historical and anticipated results and are subject to many factors. Factors we consider important which could trigger an impairment review include significant negative industry or economic trends, significant loss of customers and changes in the competitive environment of our intra-oral scanning business.

During March 2013, changes in the competitive environment for intra-oral scanners, including announcements from our competitors of new low-priced scanners targeted at orthodontists and general practitioner dentists in North America, that caused us to lower our expectations for growth and profitability for our Scanner reporting unit. As a result, we determined that the carrying value of the Scanner long-lived assets was not recoverable as compared to the value of the undiscounted cash flows of our revised projections for the asset group. In order to determine the impairment amount of our long-lived assets, we fair valued each key component of our long-lived assets within the asset group, which involved the use of significant estimates and assumptions including replacement costs, revenue growth rates, operating margins, and plant and equipment cost trends. We use a DCF approach, utilizing the harvest model, to estimate the fair value of a reporting unit which we believe is the most reliable indicator of fair value of this business, and is most consistent with the approach a market place participant would use. The estimation of fair value utilizing a DCF approach includes numerous uncertainties which require our significant judgment when making assumptions of expected growth rates and the selection of discount rates, as well as assumptions regarding general economic and business conditions, and the structure that would yield the highest economic value, among other factors. Key assumptions used in measuring the fair values of the Scanner reporting unit included the discount rate (based on the weighted-average cost of capital) and revenue growth. The fair value of Scanner’s trademark was determined using a risk-adjusted DCF approach under the relief-from-royalty method. The royalty rate used was based on a consideration of market rates. The fair value of Scanner’s finite-lived customer relationships was determined using a DCF approach under the multi-period excess earnings method. We determined our long-lived asset group within the Scanner reporting unit to be primarily finite-lived intangible assets, plant and equipment. Upon completion of this analysis, we recorded a total impairment charge of $26.3 million of which $19.3 million represented the impairment related to our Scanner intangible assets and $7.0 million related to plant and equipment. There was no triggering event related to the Clear Aligner asset group.

Intangible assets arising either as a direct result from the Cadent acquisition or individually acquired are being amortized as follows (in thousands):

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of March 31, 2014		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of March 31, 2014
Trademarks	15	$	7,100	$	(1,249	)	$	(4,179	)	$	1,672
Existing technology	13	12,600		(2,591		)	(4,328		)	5,681
Customer relationships	11	33,500		(7,701		)	(10,751		)	15,048
Other	8	285		(49		)	—			236
Total Intangible Assets		$	53,485	$	(11,590	)	$	(19,258	)	$	22,637

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2013		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of December 31, 2013
Trademarks	15	$	7,100	$	(1,100	)	(4,179		)	$	1,821
Existing technology	13	12,600		(2,236		)	(4,328		)	6,036
Customer relationships	11	33,500		(7,112		)	(10,751		)	15,637
Other	8	285		(40		)	—			245
Total Intangible Assets		$	53,485	$	(10,488	)	$	(19,258	)	$	23,739

The total estimated annual future amortization expense for these acquired intangible assets as of March 31, 2014 is as follows (in thousands):

Fiscal Year Ending December 31,
Remainder of 2014	$	1,951
2015	2,600
2016	2,600
2017	2,600
2018	2,600
Thereafter	10,286
Total	$	22,637

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Goodwill and Acquired Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2014

Notes To Financial Statements [Abstract]

Summary of Goodwill by Reportable Segment

The change in the carrying value of goodwill for the three months ended March 31, 2014 by our reportable segments, which are also our reporting units, is as follows (in thousands):

	Clear Aligner
Balance as of December 31, 2013	$	61,623
Adjustments 1	128
Balance as of March 31, 2014	$	61,751

Schedule Of Amortized Intangible Assets

Intangible assets arising either as a direct result from the Cadent acquisition or individually acquired are being amortized as follows (in thousands):

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of March 31, 2014		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of March 31, 2014
Trademarks	15	$	7,100	$	(1,249	)	$	(4,179	)	$	1,672
Existing technology	13	12,600		(2,591		)	(4,328		)	5,681
Customer relationships	11	33,500		(7,701		)	(10,751		)	15,048
Other	8	285		(49		)	—			236
Total Intangible Assets		$	53,485	$	(11,590	)	$	(19,258	)	$	22,637

	Weighted Average Amortization Period (in years)	Gross Carrying Amount as of December 31, 2013		Accumulated Amortization			Accumulated Impairment Loss			Net Carrying Value as of December 31, 2013
Trademarks	15	$	7,100	$	(1,100	)	(4,179		)	$	1,821
Existing technology	13	12,600		(2,236		)	(4,328		)	6,036
Customer relationships	11	33,500		(7,112		)	(10,751		)	15,637
Other	8	285		(40		)	—			245
Total Intangible Assets		$	53,485	$	(10,488	)	$	(19,258	)	$	23,739

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The total estimated annual future amortization expense for these acquired intangible assets as of March 31, 2014 is as follows (in thousands):

Fiscal Year Ending December 31,
Remainder of 2014	$	1,951
2015	2,600
2016	2,600
2017	2,600
2018	2,600
Thereafter	10,286
Total	$	22,637

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Subsequent Events Subsequent Events

3 Months Ended

Mar. 31, 2014

Subsequent Events [Abstract]

Subsequent Events

 Subsequent Events

On April 23, 2014, we announced that our Board of Directors had authorized a stock repurchase program pursuant to which we may purchase up to $300.0 million of our common stock over the next three years, with $100.0 million of that amount authorized to be purchased over the next twelve months. Any purchases under this stock repurchase program may be made, from time-to-time, pursuant to open market purchases (including pursuant to Rule 10b5-1 plans), privately-negotiated transactions, accelerated stock repurchases, block trades or derivative contracts or otherwise in accordance with applicable federal securities laws, including Rule 10b-18 of the Securities Exchange Act of 1934.

As part of our $300.0 million stock repurchase program, we entered into an accelerated share repurchase agreement ("ASR") with Goldman, Sachs & Co. on April 28, 2014 to repurchase $70.0 million of our common stock. Under the terms of the ASR, we agreed to repurchase in total $70.0 million of our common stock, with an initial delivery of approximately 1.0 million shares based on current market prices. The final number of shares to be repurchased will be based on our volume-weighted average stock price during the term of the transaction, less an agreed upon discount. The ASR is expected to be completed by July 29, 2014.

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Stock-based Compensation

3 Months Ended

Mar. 31, 2014

Stock-based Compensation

Stock-based Compensation

Summary of stock-based compensation expense

As of March 31, 2014, we had a total reserve of 23,283,379 shares for issuance, plus up to an aggregate of 5,000,000 shares that would have been returned to our 2001 Stock Incentive Plan as a result of termination of options on or after March 28, 2005.

Stock-based compensation is based on the estimated fair value of awards, net of estimated forfeitures, and recognized over the requisite service period. Estimated forfeitures are based on historical experience at the time of grant and may be revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The stock-based compensation related to all of our stock-based awards and employee stock purchases for the three months ended March 31, 2014 and 2013 is as follows (in thousands):

	Three Months Ended March 31,
	2014		2013
Cost of net revenues	$	844	$	580
Sales and marketing	2,667		1,011
General and administrative	4,050		3,927
Research and development	1,571		892
Total stock-based compensation	$	9,132	$	6,410

Options

Activity for the three month period ended March 31, 2014 under the stock option plans is set forth below (in thousands, except years and per share amounts):

	Stock Options Number of Shares Underlying Stock Options		Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
					(in years )
Outstanding as of December 31, 2013	1,321
Granted	—
Exercised	(472	)
Cancelled or expired	(1	)
Outstanding as of March 31, 2014	848		$	15.47	3.56	$	30,814
Vested and expected to vest at March 31, 2014	846		$	15.46	3.56	$	30,755
Exercisable at March 31, 2014	783		$	14.96	3.53	$	28,857

There were no stock options granted during the three months ended March 31, 2014 and 2013.

As of March 31, 2014, the total unamortized compensation cost related to stock options, net of estimated forfeitures, is $0.6 million, which we expect to recognize over a weighted average period of 1.0 year.

Restricted Stock Units (“RSU”)

A summary of the RSU activity for the three months ended March 31, 2014 is as follows (in thousands, except years):

	Number of Shares Underlying RSU		Weighted Remaining Vesting Period	Aggregate Intrinsic Value
			(in years)
Nonvested as of December 31, 2013	2,044
Granted	894
Vested and released	(470	)
Forfeited	(49	)
Nonvested as of March 31, 2014	2,419		1.89	$	125,272

As of March 31, 2014, the total unamortized compensation cost related to RSU, net of estimated forfeitures, was $81.7 million, which we expect to recognize over a weighted average period of 2.9 years.

We have granted market-performance based restricted stock units (“MSU”) to our executive officers. Each MSU represents the right to one share of Align’s common stock and will be issued through our amended 2005 Incentive Plan. The actual number of MSU which will be eligible to vest will be based on the performance of Align’s stock price relative to the performance of the NASDAQ Composite Index over the vesting period, generally two to three years, up to 150% of the MSU initially granted.

The following table summarizes the MSU activity for the three months ended March 31, 2014 (in thousands, except years):

	Number of Shares Underlying MSU		Weighted Average Remaining Vesting Period	Aggregate Intrinsic Value
			(in years )
Nonvested as of December 31, 2013	307
Granted	243
Vested and released	(53	)
Forfeited	—
Nonvested as of March 31, 2014	497		2.13	$	25,766

As of March 31, 2014, the total unamortized compensation costs related to the MSU, net of estimated forfeitures, was $14.1 million, which we expect to recognize over a weighted average period of 2.1 years.

Employee Stock Purchase Plan ("ESPP")

In May 2010, our stockholders approved the 2010 Employee Stock Purchase Plan ("2010 Purchase Plan") which will continue until terminated by either the Board of Directors or its administrator. The maximum number of shares available for purchase under the 2010 Purchase Plan is 2,400,000 shares. As of March 31, 2014, there remains 1,475,372 shares available for purchase under the 2010 Purchase Plan.

The fair value of the option component of the 2010 Purchase Plan shares was estimated at the grant date using the Black-Scholes option pricing model with the following weighted average assumptions:

	Three Months Ended March 31,
	2014			2013
Employee Stock Purchase Plan:
Expected term (in years)	1.2			1.2
Expected volatility	42.3		%	46.7		%
Risk-free interest rate	0.2		%	0.2		%
Expected dividends	—			—
Weighted average fair value at grant date	$	17.97		$	11.17

As of March 31, 2014, the total unamortized compensation cost related to employee purchases we expect to recognize was $2.1 million over a weighted average period of 0.7 year.

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Legal Proceedings (Notes)

3 Months Ended

Mar. 31, 2014

Legal Proceedings [Abstract]

Legal Proceedings

Legal Proceedings

Securities Class Action Lawsuit

On November 28, 2012, plaintiff City of Dearborn Heights Act 345 Police & Fire Retirement System filed a lawsuit against Align, Thomas M. Prescott (“Mr. Prescott”), Align's President and Chief Executive Officer, and Kenneth B. Arola (“Mr. Arola”), Align's former Vice President, Finance and Chief Financial Officer, in the United States District Court for the Northern District of California on behalf of a purported class of purchasers of our common stock (the "Securities Action"). On July 11, 2013, an amended complaint was filed, which named the same defendants, on behalf of a purported class of purchasers of our common stock between January 31, 2012 and October 17, 2012. The amended complaint alleged that Align, Mr. Prescott and Mr. Arola violated Section 10(b) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder, and that Mr. Prescott and Mr. Arola violated Section 20(a) of the Securities Exchange Act of 1934. Specifically, the amended complaint alleged that during the purported class period defendants failed to take an appropriate goodwill impairment charge related to the April 29, 2011 acquisition of Cadent Holdings, Inc. in the fourth quarter of 2011, the first quarter of 2012 or the second quarter of 2012, which rendered our financial statements and projections of future earnings materially false and misleading and in violation of U.S. GAAP. The amended complaint sought monetary damages in an unspecified amount, costs and attorney's fees. On December 9, 2013, the court granted defendant's motion to dismiss with leave for plaintiff to file a second amended complaint. Plaintiff filed a second amended complaint on January 8, 2014 on behalf of the same purported class. The second amended complaint states the same claims as the first amended complaint. We filed a motion to dismiss the second amended complaint on February 7, 2014. Align intends to vigorously defend itself against these allegations. Align is currently unable to predict the outcome of this amended complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible loss.

Shareholder Derivative Lawsuit

On February 1, 2013, plaintiff Gary Udis filed a shareholder derivative lawsuit against several of Align's current and former officers and directors in the Superior Court of California, County of Santa Clara. The complaint alleges that our reported income and earnings were materially overstated because of a failure to timely write down goodwill related to the April 29, 2011 acquisition of Cadent Holdings, Inc., and that defendants made allegedly false statements concerning our forecasts. The complaint asserts various state law causes of action, including claims of breach of fiduciary duty, unjust enrichment, and insider trading, among others. The complaint seeks unspecified damages on behalf of Align, which is named solely as nominal defendant against whom no recovery is sought. The complaint also seeks an order directing Align to reform and improve its corporate governance and internal procedures, and seeks restitution in an unspecified amount, costs, and attorney's fees. On July 8, 2013, an Order was entered staying this derivative lawsuit until an initial ruling on our first motion to dismiss the Securities Action. On January 15, 2014, an Order was entered staying this derivative lawsuit until an initial ruling on our second motion to dismiss the Securities Action discussed above. Align intends to vigorously defend itself against these allegations. Align is currently unable to predict the outcome of this complaint and therefore cannot determine the likelihood of loss nor estimate a range of possible losses.

In addition, in the course of Align's operations, Align is involved in a variety of claims, suits, investigations, and proceedings, including actions with respect to intellectual property claims, patent infringement claims, government investigations, labor and employment claims, breach of contract claims, tax, and other matters. Regardless of the outcome, these proceedings can have an adverse impact on us because of defense costs, diversion of management resources, and other factors. Although the results of complex legal proceedings are difficult to predict and Align's view of these matters may change in the future as litigation and events related thereto unfold; Align currently does not believe that these matters, individually or in the aggregate, will materially affect Align's financial position, results of operations or cash flows.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2014

Notes To Financial Statements [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Operating Leases

As of March 31, 2014, minimum future lease payments for non-cancelable operating leases are as follows (in thousands):

Fiscal Year Ending December 31,	Operating leases
Remainder of 2014	$	6,960
2015	8,437
2016	7,717
2017	4,413
2018	1,539
Thereafter	500
Total minimum future lease payments	$	29,566

Off-balance Sheet Arrangements

As of March 31, 2014, we had no off-balance sheet arrangements that have, or are reasonably likely to have, a current or future material effect on our consolidated financial condition, results of operations, liquidity, capital expenditures or capital resources.

Indemnification Provisions

In the normal course of business to facilitate transactions in our services and products, we indemnify certain parties: customers, vendors, lessors and other parties with respect to certain matters, including, but not limited to, services to be provided by us and intellectual property infringement claims made by third parties. In addition, we have entered into indemnification agreements with our directors and our executive officers that will require us, among other things, to indemnify them against certain liabilities that may arise by reason of their status or service as directors or officers. Several of these agreements limit the time within which an indemnification claim can be made and the amount of the claim.

It is not possible to make a reasonable estimate of the maximum potential amount under these indemnification agreements due to the unique facts and circumstances involved in each particular agreement. Additionally, we have a limited history of prior indemnification claims and the payments we have made under such agreements have not had a material adverse effect on our results of operations, cash flows or financial position. However, to the extent that valid indemnification claims arise in the future, future payments by us could be significant and could have a material adverse effect on our results of operations or cash flows in a particular period. As of March 31, 2014, we did not have any material indemnification claims that were probable or reasonably possible.

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Accounting for Income Taxes

3 Months Ended

Mar. 31, 2014

Accounting for Income Taxes

Accounting for Income Taxes

Our provision for income taxes was $10.0 million and $2.9 million for the three months ended March 31, 2014 and 2013, respectively. This represents effective tax rates of 23.5% and (7.5)%, respectively. The increase in provision for income taxes was primarily due to higher pre-tax income, which was partially offset by a jurisdictional shift in forecasted earnings from the U.S. to lower-tax non-U.S. jurisdictions. The effective tax rate for the three months ended March 31, 2013 reflects a non-deductible goodwill impairment charge of $40.7 million.

We exercise significant judgment in regards to estimates of future market growth, forecasted earnings and projected taxable income in determining the provision for income taxes, and for purposes of assessing our ability to utilize any future benefit from deferred tax assets.

As of March 31, 2014, we maintained a valuation allowance of $35.4 million against deferred tax assets primarily related to foreign net operating loss carryforwards and capital loss carryforwards. These net operating and capital loss carryforwards would result in an income tax benefit if we were to conclude it is more likely than not that the related deferred tax assets will be realized.

During the three months ended March 31, 2014, the change in our gross unrecognized tax benefits was not material. The total amount of gross unrecognized tax benefits was $27.9 million as of March 31, 2014, all of which would impact our effective tax rate if recognized. We have elected to recognize interest and penalties related to unrecognized tax benefits as a component of income taxes. The change in accrued interest and penalties during the three months ended March 31, 2014, was not material. We do not expect any significant changes to the amount of unrecognized tax benefit within the next twelve months.

During the first quarter of 2014, we adopted ASU 2013-11, "Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force)." The adoption of this standard had the effect of reducing our accruals for uncertain tax positions by $8.4 million, with an offsetting reduction in our long term deferred tax assets, but had no effect on net income.

We are subject to taxation in the U.S. and various states and foreign jurisdictions. All of our tax years will be open to examination by the U.S. federal and most state tax authorities due to our net operating loss and overall credit carryforward position. With few exceptions, we are no longer subject to examination by foreign tax authorities for years before 2006.

In June 2009, the Costa Rica Ministry of Foreign Trade, an agency of the Government of Costa Rica, granted a twelve year extension of certain income tax incentives, which were previously granted in 2002. The incentive tax rates will expire in various years beginning in 2017. Under these incentives, all of the income in Costa Rica during these twelve year incentive periods is subject to reduced rate of Costa Rica income tax. In order to receive the benefit of these incentives, we must hire specified numbers of employees and maintain certain minimum levels of fixed asset investment in Costa Rica. If we do not fulfill these conditions for any reason, our incentive could lapse, and our income in Costa Rica would be subject to taxation at higher rates. The Costa Rica corporate income tax rate that would apply, absent the incentives, is 30% for 2014. As a result of these incentives, income taxes were reduced by $7.6 million and $6.0 million for the three months ended March 31, 2014 and 2013, respectively, representing a benefit to diluted net income per share of $0.09 and $0.07 in 2014 and 2013, respectively.

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Balance Sheet Components - Additional Information (Details)	3 Months Ended
	Mar. 31, 2014
Product Information [Line Items]
Scanners, Warranty period	1 year

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Net Profit per Share - Additional Information (Details) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share, amount	1.8

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Marketable Securities and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

Short-Term And Long-Term Marketable Securities

s of March 31, 2014 and December 31, 2013, the estimated fair value of our short-term and long-term marketable securities, classified as available for sale, are as follows (in thousands):

Short-term

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial paper	$	67,332	$	10	$	(1	)	$	67,341
Corporate bonds	59,282		42		(14		)	59,310
U.S. government agency bonds	22,794		17		(6		)	22,805
Asset-backed securities	13,934		8		(1		)	13,941
Municipal securities	9,613		13		—			9,626
U.S. dollar dominated foreign corporate bonds	8,102		8		(2		)	8,108
U.S. government treasury bonds	2,546		—		—			2,546
Total Marketable Securities, Short-Term	$	183,603	$	98	$	(24	)	$	183,677

Long-term

March 31, 2014	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds	$	45,844	$	41	$	(49	)	$	45,836
U.S. government agency bonds	31,077		11		(4		)	31,084
Asset-backed securities	20,501		5		(5		)	20,501
U.S. government treasury bonds	20,598		15		(1		)	20,612
U.S. dollar dominated foreign corporate bonds	13,783		2		(17		)	13,768
Municipal securities	7,114		15		(1		)	7,128
Total Marketable Securities, Long-Term	$	138,917	$	89	$	(77	)	$	138,929

Short-term

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Corporate bonds	$	29,079	$	10	$	(4	)	$	29,085
Commercial paper	54,318		10		—			54,328
U.S. government agency bonds	16,693		10		—			16,703
U.S. dollar dominated foreign corporate bonds	13,959		12		—			13,971
Municipal securities	7,006		11		(3		)	7,014
Asset-backed securities	5,937		2		—			5,939
Total Marketable Securities, Short-Term	$	126,992	$	55	$	(7	)	$	127,040

Long-term

December 31, 2013	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. government agency bonds	$	38,138	$	1	$	(21	)	$	38,118
Corporate bonds	23,308		14		(9		)	23,313
U.S. dollar dominated foreign corporate bonds	19,485		27		(17		)	19,495
Municipal securities	8,326		13		(8		)	8,331
U.S. government treasury bonds	6,916		3		—			6,919
Asset-backed securities	5,800		4		(2		)	5,802
Total Marketable Securities, Long-Term	$	101,973	$	62	$	(57	)	$	101,978

Investments Classified by Contractual Maturity Date [Table Text Block]

	March 31,		December 31,
	2014		2013
Due in one year or less	$	183,677	$	127,040
Due in one year to 27 months	138,929		101,978
Total available for sale short-term and long-term marketable securities	$	322,606	$	229,018

Financial Assets Measured At Fair Value On Recurring Basis

The following table summarizes our financial assets measured at fair value on a recurring basis as of March 31, 2014 and December 31, 2013 (in thousands):

Description	Balance as of March 31, 2014		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)
Cash equivalents:
Money market funds	$	55,518	$	55,518	$	—
Commercial paper	32,995		—		32,995
Corporate bonds	2,010		—		2,010
Short-term investments:
Commercial paper	67,341		—		67,341
Corporate bonds	59,310		—		59,310
U.S. government agency bonds	22,805		—		22,805
Asset-backed securities	13,941		—		13,941
Municipal securities	9,626		—		9,626
U.S. dollar dominated foreign corporate bonds	8,108		—		8,108
U.S. government treasury bonds	2,546		—		2,546
Long-term investments:
Corporate bonds	45,836		—		45,836
U.S. government agency bonds	31,084		—		31,084
Asset-backed securities	20,501		—		20,501
U.S. government treasury bonds	20,612		20,612		—
U.S. dollar dominated foreign corporate bonds	13,768		—		13,768
Municipal securities	7,128		—		7,128
Other assets:
Israeli funds	2,274		—		2,274
	$	415,403	$	76,130	$	339,273

Description	Balance as of December 31, 2013		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable  Inputs (Level 2)
Cash equivalents:
Money market funds	$	143,540	$	143,540	$	—
Commercial paper	15,398		—		15,398
Short-term investments:
Commercial paper	54,328		—		54,328
Corporate bonds	29,085		—		29,085
U.S. dollar denominated foreign corporate bonds	13,971		—		13,971
Municipal securities	7,014		—		7,014
U.S. government agency bonds	16,703		—		16,704
Asset-backed securities	5,939		—		5,938
Long-term investments:
U.S. government agency bonds	38,118		—		38,118
Corporate bonds	23,313		—		23,313
U.S. dollar denominated foreign corporate bonds	19,495		—		19,495
U.S. government treasury bonds	6,919		6,919		—
Municipal securities	8,331		—		8,331
Asset-backed securities	5,802		—		5,802
Other assets:
Israeli funds	2,193		—		2,193
	$	390,149	$	150,459	$	239,690

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Net Profit Per Share (Tables)

3 Months Ended

Mar. 31, 2014

Schedule Of Earnings Per Share Basic And Diluted

	Three Months Ended, March 31
	2014		2013
Numerator:
Net income (loss)	$	32,444	$	(41,983	)
Denominator:
Weighted-average common shares outstanding, basic	81,120		81,248
Dilutive effect of potential common stock	1,697		—
Total shares, diluted	82,817		81,248
Net income (loss) per share, basic	$	0.40	$	(0.52	)
Net income (loss) per share, diluted	$	0.39	$	(0.52	)

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Accounting for Income Taxes - Additional Information (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Taxes [Line Items]
Provision for income taxes	$ 9,961,000	$ 2,920,000
Effective Income Tax Rate, Continuing Operations	23.50%	(7.50%)
Impairment of goodwill	0	40,693,000
Valuation allowance, deferred tax asset	35,400,000
Unrecognized tax benefits	27,900,000
Tax holiday effect on diluted earnings per share	$ 0.09	$ 0.07
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Foreign income tax rate	30.00%
Tax Holiday effect	$ 7,600,000	$ 6,000,000

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Credit Facilities - Additional Information (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 22, 2013	Mar. 31, 2014 Revolving Credit Facility [Member] Wells Fargo [Member]	Mar. 22, 2013 Revolving Credit Facility [Member] Wells Fargo [Member]	Mar. 31, 2014 Letter of Credit [Member] Wells Fargo [Member]	Mar. 22, 2013 Letter of Credit [Member] Wells Fargo [Member]
Line of Credit Facility [Line Items]
Line of credit, available borrowings			$ 50.0		$ 10.0
Unrestricted Cash Deposit		50.0
Debt Instrument, Basis Spread on Variable Rate	1.75%
Line of Credit Facility, Amount Outstanding				$ 0

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts receivable, allowance for doubtful accounts and returns	$ 1,798	$ 1,733
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Common stock, par value (in usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	81,632	80,583
Common stock, shares outstanding	81,632	80,583

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Business Combinations (Notes)

3 Months Ended

Mar. 31, 2014

Business Combinations [Abstract]

Business Combination Disclosure

Business Combinations

On April 30, 2013, we completed the acquisition of ICA Holdings Pty Limited ("ICA") upon the expiration of the distribution agreement between certain subsidiaries of ICA and Align Technology B.V., for a total cash consideration of approximately $8.6 million, of which $7.4 million was attributed to assets acquired, $2.4 million in liabilities assumed and $3.6 million to goodwill. Goodwill as a result of this acquisition represents the excess of the purchase price over the fair value of the underlying net assets acquired and represents the knowledge and experience of the workforce in place. None of this goodwill will be deductible for tax purposes. Under the applicable accounting guidance, goodwill will not be amortized but will be tested for impairment on an annual basis or more frequently if certain indicators are present.  

We believe that the transition from our distributor arrangement to a direct sales model as a result of the acquisition of ICA will increase our net revenues in the region as we will experience higher average selling price(s) (“ASP”) as compared to our discounted ASP under the prior distribution agreement. 

Pro forma results of operations for this acquisition have not been presented as it is not material to our results of operations, either individually or in aggregate, for the three months ended March 31, 2013.

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Segments and Geographical Information (Tables)

3 Months Ended

Mar. 31, 2014

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

These reportable operating segments are based on how our CODM views and evaluates our operations as well as allocation of resources (in thousands):

	For the Three Months Ended March 31,
Net Revenues	2014		2013
Clear Aligner
Invisalign Full Products	$	138,133	$	112,780
Invisalign Express/Lite Products	19,625		16,083
Invisalign non-case revenues	10,481		12,709
Scanner
Scanners and Services	12,407		12,008
Total net revenues	$	180,646	$	153,580
Gross profit
Clear Aligner	$	133,083	$	109,327
Scanners and Services	4,168		3,522
Total gross profit	$	137,251	$	112,849

Geographical Information

Net revenues and tangible long-lived assets are presented below by geographic area (in thousands):

	For the Three Months Ended March 31,
	2014		2013
Net revenues: (1)
U.S.	$	128,640	$	119,840
the Netherlands	38,843		26,947
Other international	13,163		6,793
Total net revenues	$	180,646	$	153,580

⁽¹⁾ Net revenues are attributed to countries based on location of where revenue is recognized.

	March 31,		December 31,
	2014		2013
Long-lived assets:(2)
United States	$	65,141	$	61,439
Mexico	6,272		6,291
the Netherlands	1,492		1,630
Other International	6,188		6,383
Total long-lived assets	$	79,093	$	75,743

⁽²⁾ Long-lived assets are attributed to countries based on entity that owns the asset.

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Intangible Assets as Direct Result from Cadent Acquisition (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, beginning balance	$ 53,485	$ 53,485
Accumulated Amortization	(11,590)	(10,488)
Accumulated Impairment Loss	(19,258)	(19,258)
Net Carrying Value, ending balance	22,637	23,739
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, beginning balance	7,100	7,100
Accumulated Amortization	(1,249)	(1,100)
Accumulated Impairment Loss	(4,179)	(4,179)
Net Carrying Value, ending balance	1,672	1,821
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years	15 years
Existing technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, beginning balance	12,600	12,600
Accumulated Amortization	(2,591)	(2,236)
Accumulated Impairment Loss	(4,328)	(4,328)
Net Carrying Value, ending balance	5,681	6,036
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	13 years	13 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, beginning balance	33,500	33,500
Accumulated Amortization	(7,701)	(7,112)
Accumulated Impairment Loss	(10,751)	(10,751)
Net Carrying Value, ending balance	15,048	15,637
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years	11 years
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, beginning balance	285	285
Accumulated Amortization	(49)	(40)
Accumulated Impairment Loss	0	0
Net Carrying Value, ending balance	$ 236	$ 245
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	8 years	8 years

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2014

Basis of presentation

Basis of presentation

The accompanying unaudited Condensed Consolidated Financial Statements have been prepared by Align Technology, Inc. (“we”, “our”, or “Align”) in accordance with the rules and regulations of the Securities and Exchange Commission ("SEC") and contain all adjustments, including normal recurring adjustments, necessary to present fairly our results of operations for the three months ended March 31, 2014 and 2013, our comprehensive income (loss) for the three months ended March 31, 2014 and 2013, our financial position as of March 31, 2014 and our cash flows for the three months ended March 31, 2014 and 2013. The Condensed Consolidated Balance Sheet as of December 31, 2013 was derived from the December 31, 2013 audited financial statements. Net revenues by geographic area for prior period amounts in Note 12 have been reclassified to conform with the current period presentation. These reclassifications had no impact on our financial position for the three months ended March 31, 2014 and 2013.

The results of operations for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014 or any other future period, and we make no representations related thereto. The information included in this Quarterly Report on Form 10-Q should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Quantitative and Qualitative Disclosures About Market Risk” and the Consolidated Financial Statements and notes thereto included in Items 7, 7A and 8, respectively, in our Annual Report on Form 10-K for the year ended December 31, 2013.

Use of estimates

Use of estimates

The preparation of financial statements in conformity with generally accepted accounting principles ("GAAP") in the United States of America (“U.S.”) requires our management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ materially from those estimates. On an ongoing basis, we evaluate our estimates, including those related to the fair values of financial instruments, long-lived assets and goodwill, useful lives of intangible assets and property and equipment, stock-based compensation, income taxes, and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.

Recent Accounting Pronouncements

Recent Accounting Pronouncements

In July 2013, Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-11, "Presentation of an Unrecognized Tax Benefit when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force)." The amendments in this ASU provide guidance on the financial statements presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. An unrecognized tax benefit should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward with certain exceptions, in which case such an unrecognized tax benefit should be presented in the financial statements as a liability. The amendments in this ASU do not require new recurring disclosures and are effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. The adoption of this standard in the first quarter of 2014 had the effect of reducing our accruals for uncertain tax positions by $8.4 million, with an offsetting reduction in our long term deferred tax assets, but had no effect on net income.