Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (118,122)	$ (23,180)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	12,344	4,456
Stock-based compensation	16,344	3,921
Change in fair value of preferred stock warrant liability	6,538	1,234
Loss on disposal of property and equipment	102	73
Release of deferred tax valuation allowance	(1,277)	0
Changes in operating assets and liabilities, net of assets acquired and liabilities assumed in business combinations:
Accounts receivable	(20,727)	(5,607)
Inventories	(5,174)	(1,942)
Prepaid expenses and other assets	(4,772)	(790)
Deferred costs of revenue	(904)	(695)
Accounts payable	6,115	990
Accrued liabilities	3,711	2,198
Accrued compensation	6,481	372
Deferred revenue	54,370	29,481
Other long-term liabilities	547	134
Net cash provided by (used in) operating activities	(44,424)	10,645
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of business, net of cash acquired	(3,872)	0
Purchase of property and equipment and demonstration units	(35,956)	(14,486)
Lease deposits	(1,636)	(471)
Net cash used in investing activities	(41,464)	(14,957)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from initial public offering	322,863	0
Borrowing from line of credit	10,000	7,619
Net proceeds from issuance of convertible preferred stock	9,988	0
Repayment of term loan	(2,147)	(1,051)
Proceeds from exercise of equity awards	5,400	1,283
Repayment of notes receivable from stockholders	7,294	0
Net cash provided by financing activities	353,398	7,851
Net change in cash and cash equivalents	267,510	3,539
Cash and cash equivalents, beginning of year	60,200	10,676
Cash and cash equivalents, end of year	327,710	14,215
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest	493	347
Cash paid for income taxes	303	22
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Deferred initial public offering costs in accounts payable and accrued liabilities	1,583	0
Common stock issued in connection with acquisition	800	0
Conversion of preferred stock warrants to common stock warrants	10,067	0
Purchases of property and equipment and demonstration units in accounts payable	$ 12,520	$ 1,127