10-Q

UNITED STATES

Securities and Exchange Commission

Washington, D.C. 20549

Form 10-Q

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

ACT OF 1934

For the quarterly period ended June 30, 2013

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 1-13412

Hudson Technologies, Inc.

(Exact name of registrant as specified in its charter)

New York (State or other jurisdiction of incorporation or organization)	13-3641539 (I.R.S. Employer Identification No.)
1 Blue Hill Plaza
P.O. Box 1541 Pearl River, New York (Address of principal executive offices)	10965 (Zip Code)
Registrant’s telephone number, including area code		(845) 735-6000

(Former name, former address, and former fiscal year, if changed since last report)

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. x Yes ¨ 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 (SECTION 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.)

x Yes ¨ 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 the definitions of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Exchange Act:

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

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

State the number of shares outstanding of each of the issuer’s classes of common equity, as of the latest practicable date:

Common stock, $0.01 par value	25,070,386 shares
Class	Outstanding at August 2, 2013

Hudson Technologies, Inc.

Index

Part	Item		Page
Part I.	Financial Information
	Item 1	- Financial Statements
		- Consolidated Balance Sheets	3
		- Consolidated  Income Statements	4
		- Consolidated Statements of Cash Flows	5
		- Notes to the Consolidated Financial Statements	6
	Item 2	- Management’s Discussion and Analysis of Financial Condition and Results of Operations	13
	Item 3	- Quantitative and Qualitative Disclosures About Market Risk	18
	Item 4	- Controls and Procedures	18
Part II.	Other Information
	Item 1	- Legal Proceedings	20
	Item 6	- Exhibits	20
	Signatures		21

2

Part I – FINANCIAL INFORMATION

Item 1-Financial Statements

Hudson Technologies, Inc. and subsidiaries

Consolidated Balance Sheets

(Amounts in thousands, except for share and par value amounts)

	June 30, 2013			December 31, 2012
	(unaudited)
Assets
Current assets:
Cash and cash equivalents	$	2,374		$	3,991
Trade accounts receivable - net of allowance for doubtful accounts of $250 and $227		11,866			1,956
Inventories		51,298			40,167
Prepaid expenses and other current assets		2,991			676
Deferred tax asset		234			234
Total current assets		68,763			47,024
Property, plant and equipment, less accumulated depreciation and amortization		4,903			4,765
Other assets		291			341
Deferred tax asset		3,391			3,888
Investments in affiliates		1,165			1,138
Intangible assets, less accumulated amortization		62			76
Total Assets	$	78,575		$	57,232
Liabilities and Stockholders' Equity
Current liabilities:
Accounts payable and accrued expenses	$	9,117		$	6,219
Accrued payroll		280			661
Income taxes payable		1,237			0
Short-term debt and current maturities of long-term debt		24,475			12,736
Total current liabilities		35,109			19,616
Long-term debt, less current maturities		4,824			4,920
Total Liabilities		39,933			24,536
Commitments and contingencies
Stockholders' equity:
Preferred stock shares authorized 5,000,000; Series A convertible preferred stock, $0.01 par value ($100 liquidation preference value); shares authorized 150,000; none issued or outstanding		0			0
Common stock, $0.01 par value; shares authorized 50,000,000; 25,070,386 and 24,124,625 issued and outstanding		251			241
Additional paid-in capital		44,856			43,722
Accumulated deficit		(6,465	)		(11,267	)
Total Stockholders' Equity		38,642			32,696
Total Liabilities and Stockholders' Equity	$	78,575		$	57,232

See Accompanying Notes to the Consolidated Financial Statements.

3

Hudson Technologies, Inc. and subsidiaries

Consolidated Income Statements

(unaudited)

(Amounts in thousands, except for share and per share amounts)

	Three month period						Six month period
	ended June 30,						ended June 30,
	2013			2012			2013			2012
Revenues	$	15,768		$	22,251		$	38,645		$	37,105
Cost of sales		13,220			12,014			26,935			20,900
Gross Profit		2,548			10,237			11,710			16,205
Operating expenses:
Selling and marketing		818			673			1,641			1,354
General and administrative		956			1,095			1,890			2,164
Total operating expenses		1,774			1,768			3,531			3,518
Operating income		774			8,469			8,179			12,687
Other income (expense):
Interest expense		(243	)		(187	)		(440	)		(358	)
Interest income		0			1			0			1
Total other income (expense)		(243	)		(186	)		(440	)		(357	)
Income before income taxes		531			8,283			7,739			12,330
Income tax expense		197			3,148			2,936			4,686
Net income	$	334		$	5,135		$	4,803		$	7,644

Net income per common share – Basic	$	0.01	$	0.22	$	0.20	$	0.32
Net income per common share - Diluted	$	0.01	$	0.20	$	0.18	$	0.29
Weighted average number of shares outstanding – Basic		24,891,115		23,841,996		24,605,541		23,813,776
Weighted average number of shares outstanding - Diluted		26,859,009		26,177,960		26,670,232		26,149,740

See Accompanying Notes to the Consolidated Financial Statements.

4

Hudson Technologies, Inc. and subsidiaries

Consolidated Statements of Cash Flows

Decrease in Cash and Cash Equivalents

(unaudited)

(Amounts in thousands)

	Six month period ended June 30,
	2013			2012
Cash flows from operating activities:
Net income	$	4,803		$	7,644
Adjustments to reconcile net income to cash used by operating activities:
Depreciation and amortization		388			264
Allowance for doubtful accounts		23			1
Value of share-based payment arrangements		33			0
Amortization of deferred finance costs		41			0
Deferred tax benefit utilization		497			3,086
Changes in assets and liabilities:
Trade accounts receivable		(9,933	)		(5,734	)
Inventories		(11,131	)		(15,403	)
Prepaid and other assets		(2,305	)		(3,307	)
Accounts payable and accrued expenses		2,517			9,211
Income taxes payable		1,237			701
Cash used by operating activities		(13,830	)		(3,537	)
Cash flows from investing activities:
Additions to patents		0			(20	)
Additions to property, plant, and equipment		(513	)		(533	)
Investment in affiliates		(27	)		(3	)
Cash used by investing activities		(540	)		(556	)
Cash flows from financing activities:
Proceeds from issuance of common stock		1,110			116
Proceeds from short-term debt – net		11,736			1,711
Proceeds from issuance of long-term debt		0			4,387
Repayment of long-term debt		(93	)		(2,071	)
Cash provided by financing activities		12,753			4,143
(Decrease) Increase in cash and cash equivalents		(1,617	)		50
Cash and cash equivalents at beginning of period		3,991			3,958
Cash and cash equivalents at end of period	$	2,374		$	4,008

Supplemental Disclosure of Cash Flow Information:
Cash paid during period for interest	$	399	$	358
Cash paid for income taxes	$	1,085	$	899

See Accompanying Notes to the Consolidated Financial Statements.

5

Hudson Technologies, Inc. and subsidiaries

Notes to the Consolidated Financial Statements

Note 1 - Summary of significant accounting policies

Business

Hudson Technologies, Inc., incorporated under the laws of New York on January 11, 1991, is a refrigerant services company providing innovative solutions to recurring problems within the refrigeration industry. The Company's products and services are primarily used in commercial air conditioning, industrial processing and refrigeration systems, including (i) refrigerant sales, (ii) refrigerant management services consisting primarily of reclamation of refrigerants and (iii) RefrigerantSide® Services performed at a customer's site, consisting of system decontamination to remove moisture, oils and other contaminants. In addition, RefrigerantSide® Services include predictive and diagnostic services for industrial and commercial refrigeration applications, which are designed to predict potential catastrophic problems and identify inefficiencies in an operating system. The Company’s Chiller Chemistry®, Chill Smart®, Fluid Chemistry®, and Performance Optimization are predictive and diagnostic service offerings. As a component of the Company’s products and services, the Company also participates in the generation of carbon offset projects. The Company operates principally through its wholly-owned subsidiary, Hudson Technologies Company. Unless the context requires otherwise, references to the “Company”, “Hudson”, “we”, “us”, “our”, or similar pronouns refer to Hudson Technologies, Inc. and its subsidiaries.

In preparing the accompanying consolidated financial statements, and in accordance with ASC855-10 “Subsequent Events”, the Company’s management has evaluated subsequent events through the date that the financial statements were filed.

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial statements and with the instructions of Regulation S-X. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. The financial information included in the quarterly report should be read in conjunction with the Company’s audited financial statements and related notes thereto for the year ended December 31, 2012. Operating results for the six month period ended June 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.

In the opinion of management, all estimates and adjustments considered necessary for a fair presentation have been included and all such adjustments were normal and recurring.

Consolidation

The consolidated financial statements represent all companies of which Hudson directly or indirectly has majority ownership or otherwise controls. Significant intercompany accounts and transactions have been eliminated. The Company's consolidated financial statements include the accounts of wholly-owned subsidiaries Hudson Holdings, Inc. and Hudson Technologies Company.

Fair value of financial instruments

The carrying values of financial instruments including trade accounts receivable and accounts payable approximate fair value at June 30, 2013 and December 31, 2012, because of the relatively short maturity of these instruments. The carrying value of short and long-term debt approximates fair value, based upon quoted market rates of similar debt issues, as of June 30, 2013 and December 31, 2012.

Credit risk

Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of temporary cash investments and trade accounts receivable. The Company maintains its temporary cash investments in highly-rated financial institutions and, at times, the balances exceed FDIC insurance coverage. The Company's trade accounts receivables are primarily due from companies throughout the United States. The Company reviews each customer's credit history before extending credit.

The Company establishes an allowance for doubtful accounts based on factors associated with the credit risk of specific accounts, historical trends, and other information. The carrying value of the Company’s accounts receivable is reduced by the established allowance for doubtful accounts. The allowance for doubtful accounts includes any accounts receivable balances that are determined to be uncollectible, along with a general reserve for the remaining accounts receivable balances. The Company adjusts its reserves based on factors that affect the collectability of the accounts receivable balances.

6

For the six month period ended June 30, 2013, two customers each accounted for 10% or more of the Company’s revenues and in the aggregate these two customers accounted for 29% of the Company’s revenues. At June 30, 2013, there were $1,800,000 in outstanding receivables from these customers. For the six month period ended June 30, 2012, three customers each accounted for 10% or more of the Company’s revenues and in the aggregate these three customers accounted for 40% of the Company’s revenues. At June 30, 2012, there were $3,300,000 in outstanding receivables from these customers.

The loss of a principal customer or a decline in the economic prospects of and/or a reduction in purchases of the Company's products or services by any such customer could have a material adverse effect on the Company's operating results and financial position.

Cash and cash equivalents

Temporary investments with original maturities of ninety days or less are included in cash and cash equivalents.

Inventories

Inventories, consisting primarily of refrigerant products available for sale, are stated at the lower of cost, on a first-in first-out basis, or market.

Property, plant, and equipment

Property, plant, and equipment are stated at cost, including internally manufactured equipment. The cost to complete equipment that is under construction is not considered to be material to the Company's financial position. Provision for depreciation is recorded (for financial reporting purposes) using the straight-line method over the useful lives of the respective assets. Leasehold improvements are amortized on a straight-line basis over the shorter of economic life or terms of the respective leases. Costs of maintenance and repairs are charged to expense when incurred.

Due to the specialized nature of the Company's business, it is possible that the Company's estimates of equipment useful life periods may change in the future.

Revenues and cost of sales

Revenues are recorded upon completion of service or product shipment and passage of title to customers in accordance with contractual terms. The Company evaluates each sale to ensure collectability. In addition, each sale is based on an arrangement with the customer and the sales price to the buyer is fixed. License fees are recognized over the period of the license based on the respective performance measurements associated with the license. Royalty revenues are recognized when earned. Cost of sales is recorded based on the cost of products shipped or services performed and related direct operating costs of the Company's facilities. To the extent that the Company charges its customers shipping fees, such amounts are included as a component of revenue and the corresponding costs are included as a component of cost of sales.

The Company's revenues are derived from refrigerant and reclamation sales and RefrigerantSide® Services, including license and royalty revenues. The revenues for each of these lines are as follows:

Six Month Period Ended June 30,	2013		2012
(in thousands, unaudited)
Refrigerant and reclamation sales	$	36,268	$	34,776
RefrigerantSide® services		2,377		2,329
Total	$	38,645	$	37,105

Income taxes

The Company utilizes the asset and liability method for recording deferred income taxes, which provides for the establishment of deferred tax asset or liability accounts based on the difference between tax and financial reporting bases of certain assets and liabilities. The tax benefit associated with the Company's net operating loss carry forwards (“NOLs”) is recognized to the extent that the Company is expected to recognize future taxable income. The Company assesses the recoverability of its deferred tax assets based on its expectation that it will recognize future taxable income and adjusts its valuation allowance accordingly. As of June 30, 2013 and December 31, 2012, the net deferred tax asset was $3,625,000 and $4,122,000, respectively.

Certain states either do not allow or limit NOLs and as such the Company will be liable for certain state taxes. To the extent that the Company utilizes its NOLs, it will not pay tax on such income but may be subject to the federal alternative minimum tax. In addition, to the extent that the Company’s net income, if any, exceeds the annual NOL limitation it will pay income taxes based on existing statutory rates. Moreover, as a result of a “change in control”, as defined by the Internal Revenue Service, the Company’s ability to utilize its existing NOLs is subject to certain annual limitations. The Company’s NOLs are subject to annual limitations of $1,300,000.

7

As a result of an Internal Revenue Service audit, the 2006 and prior federal tax years have been closed. The Company operates in many states throughout the United States and, as of June 30, 2013, the various states’ statutes of limitations remain open for tax years subsequent to 2008. The Company recognizes interest and penalties, if any, relating to income taxes as a component of the provision for income taxes.

The Company evaluates uncertain tax positions, if any, by determining if it is more likely than not to be sustained upon examination by the taxing authorities. As of June 30, 2013 and December 31, 2012, the Company had no uncertain tax positions.

Income per common and equivalent shares

If dilutive, common equivalent shares (common shares assuming exercise of options and warrants) utilizing the treasury stock method are considered in the presentation of diluted earnings per share. The reconciliation of shares used to determine net income per share is as follows (dollars in thousands, unaudited):

	Three Month Period Ended June 30,				Six Month Period Ended June 30,
	2013		2012		2013		2012
Net Income	$	334	$	5,135	$	4,803	$	7,644
Weighted average number of shares – basic		24,891,115		23,841,996		24,605,541		23,813,776
Weighted average number of shares underlying warrants		383,123		277,867		432,705		277,867
Weighted average number of shares underlying options		1,584,771		2,058,097		1,631,986		2,058,097
Weighted average number of shares outstanding – diluted		26,859,009		26,177,960		26,670,232		26,149,740

During the three and six month periods ended June 30, 2013 and 2012, certain options and warrants aggregating 50,000 and no shares, respectively, have been excluded from the calculation of diluted shares, due to the fact that their effect would be anti-dilutive.

Estimates and risks

The preparation of financial statements in conformity with generally accepted accounting principles in the United States requires management to make estimates and assumptions that affect reported amounts of certain assets and liabilities, the disclosure of contingent assets and liabilities, and the results of operations during the reporting period. Actual results could differ from these estimates.

The Company utilizes both internal and external sources to evaluate potential current and future liabilities for various commitments and contingencies. In the event that the assumptions or conditions change in the future, the estimates could differ from the original estimates.

Several of the Company's accounting policies involve significant judgments, uncertainties and estimations. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. To the extent that actual results differ from management's judgments and estimates, there could be a material adverse effect on the Company. On a continuous basis, the Company evaluates its estimates, including, but not limited to, those estimates related to its allowance for doubtful accounts, inventory reserves, and valuation allowance for the deferred tax assets relating to its NOLs and commitments and contingencies. With respect to accounts receivable, the Company estimates the necessary allowance for doubtful accounts based on both historical and anticipated trends of payment history and the ability of the customer to fulfill its obligations. For inventory, the Company evaluates both current and anticipated sales prices of its products to determine if a write down of inventory to net realizable value is necessary. In determining the Company’s valuation allowance for its deferred tax assets, the Company assesses its ability to generate taxable income in the future.

8

The Company participates in an industry that is highly regulated, changes in which could affect operating results. Currently the Company purchases virgin, hydrochlorofluorocarbon (“HCFC”) and hydrofluorocarbon (“HFC”) refrigerants and reclaimable, primarily HCFC and chlorofluorocarbon (“CFC”), refrigerants from suppliers and its customers. Effective January 1, 1996, the Clean Air Act (the “Act”) prohibited the production of virgin CFC refrigerants and limited the production of virgin HCFC refrigerants. Effective January 2004, the Act further limited the production of virgin HCFC refrigerants and federal regulations were enacted which established production and consumption allowances for HCFC refrigerants and which imposed limitations on the importation of certain virgin HCFC refrigerants. Under the Act, production of certain virgin HCFC refrigerants is scheduled to be phased out during the period 2010 through 2020, and production of all virgin HCFC refrigerants is scheduled to be phased out by 2030. Additionally, effective January 1, 2010, the Act further limited the production of virgin HCFC refrigerants, and additional federal regulations have been enacted which imposed further limitation and a phase down on the use, production and importation of virgin HCFC refrigerants for the years 2010 through 2014. As a result of litigation, the federal regulations implementing the January 2010 phase down schedule were vacated, and in March 2013, the Environmental Protection Agency (“EPA”) published a final rule providing for further reduction in the production of HCFC refrigerants when compared to the reductions established in the January 1, 2010 published rule. The final rule allows for the production or importation of 63 million and 51 million pounds of HCFC-22 in 2013 and 2014, respectively. The EPA has not yet issued a proposed or final rule establishing the total pounds of HCFC-22 that can be produced or imported during the years 2015 through 2019.

To the extent that the Company is unable to source sufficient quantities of refrigerants or is unable to obtain refrigerants on commercially reasonable terms or experiences a decline in demand and/or price for refrigerants sold by it, the Company could realize reductions in revenue from refrigerant sales, which could have a material adverse effect on the Company’s operating results and financial position.

The Company is subject to various legal proceedings. The Company assesses the merit and potential liability associated with each of these proceedings. In addition, the Company estimates potential liability, if any, related to these matters. To the extent that these estimates are not accurate, or circumstances change in the future, the Company could realize liabilities, which could have a material adverse effect on operating results and its financial position.

Impairment of long-lived assets

The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the assets to the future net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell.

Recent accounting pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2013-2 (“ASU 2013-2”), “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Topic 220).” ASU 2013-2 requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. ASU 2013-2 became effective for fiscal years beginning after December 31, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statements.

In March 2013, the FASB issued Accounting Standards Update 2013-5 (“ASU 2013-5”), “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups within a Foreign Entity or of an Investment in a Foreign Entity (Topic 830),” ASU 2013-5 requires entities that cease to hold a controlling financial interest (as described in Subtopic 810-10) in a subsidiary or group of assets within a foreign entity when (1) the subsidiary or group of assets is a nonprofit activity or a business (other than a sale in substance of real estate or conveyance of oil and gas mineral rights) and (2) there is a cumulative translation adjustment balance associated with that foreign entity. The amendments also affect entities that lose a controlling financial interest in an investment in a foreign entity (by sale or other transfer event) and those that acquire a business in stages (sometimes also referred to as a step acquisition) by increasing an investment in a foreign entity from one accounted for under the equity method to one accounted for as a consolidated investment. ASU 2013-5 will become effective prospectively for fiscal years (and interim reporting periods within those years) beginning after December 15, 2013. The Company does not anticipate that this update will have a material impact on the Company’s consolidated financial statements.

Note 2 - Share-based compensation

Share-based compensation represents the cost related to share-based awards, typically stock options, granted to employees, non-employees, officers and directors. Share-based compensation is measured at grant date, based on the estimated aggregate fair value of the award on the grant date, and such amount is charged to compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. For the six month period ended June 30, 2013 and 2012, the share-based compensation expense of $33,000 and none, respectively, is reflected in general and administrative expenses in the consolidated income statements.

9

Share-based awards have historically been stock options issued pursuant to the terms of the Company’s 1994 and 1997 stock option plans and the Company’s 2004 and 2008 stock incentive plans, (collectively, the “Plans”), described below. The Plans may be administered by the Board of Directors or the Compensation Committee of the Board or by another committee appointed by the Board from among its members as provided in the Plans. Presently, the Plans are administered by the Company’s Compensation Committee of the Board of Directors. As of June 30, 2013, the Plans authorized the issuance of stock options to purchase 5,500,000 shares of the Company’s common stock and, as of June 30, 2013 there were 2,595,087 shares of the Company’s common stock available for issuance for future stock option grants or other stock based awards.

Stock option awards, which allow the recipient to purchase shares of the Company’s common stock at a fixed price, are typically granted at an exercise price equal to the Company’s stock price at the date of grant. Typically, the Company’s stock option awards have generally vested from immediately to two years from the grant date and have had a contractual term ranging from five to ten years.

For the six month period ended June 30, 2013 and 2012, the Company issued 50,000 and no options, respectively. As of June 30, 2013, there was $98,000 of unrecognized compensation cost related to non-vested previously granted option awards.

Effective October 31, 1994, the Company adopted an Employee Stock Option Plan (“1994 Plan”) pursuant to which 725,000 shares of common stock were reserved for issuance upon the exercise of options designated as either (i) options intended to constitute incentive stock options (“ISOs”) under the Internal Revenue Code of 1986, as amended (“Code”), or (ii) nonqualified options. ISOs could be granted under the 1994 Plan to employees and officers of the Company. Non-qualified options could be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Effective November 1, 2004, the Company’s ability to grant options under the 1994 Plan expired.

Effective July 25, 1997, the Company adopted its 1997 Employee Stock Option Plan, which was amended on August 19, 1999, (“1997 Plan”) pursuant to which 2,000,000 shares of common stock were reserved for issuance upon the exercise of options designated as either (i) ISOs under the Code, or (ii) nonqualified options. ISOs could be granted under the 1997 Plan to employees and officers of the Company. Non-qualified options could be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Stock appreciation rights could also be issued in tandem with stock options. Effective June 11, 2007, the Company’s ability to grant options or stock appreciation rights under the 1997 Plan expired.

Effective September 10, 2004, the Company adopted its 2004 Stock Incentive Plan (“2004 Plan”) pursuant to which 2,500,000 shares of common stock were reserved for issuance upon the exercise of options, designated as either (i) ISOs under the Code, or (ii) nonqualified options, restricted stock, deferred stock or other stock-based awards. ISOs may be granted under the 2004 Plan to employees and officers of the Company. Non qualified options, restricted stock, deferred stock or other stock-based awards may be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Stock appreciation rights may also be issued in tandem with stock options. Unless the 2004 Plan is sooner terminated, the ability to grant options or other awards under the 2004 Plan will expire on September 10, 2014.

ISOs granted under the 2004 Plan may not be granted at a price less than the fair market value of the common stock on the date of grant (or 110% of fair market value in the case of persons holding 10% or more of the voting stock of the Company). Nonqualified options granted under the 2004 Plan may not be granted at a price less than the fair market value of the common stock. Options granted under the 2004 Plan expire not more than ten years from the date of grant (five years in the case of ISOs granted to persons holding 10% or more of the voting stock of the Company).

Effective August 27, 2008, the Company adopted its 2008 Stock Incentive Plan (“2008 Plan”) pursuant to which 3,000,000 shares of common stock were reserved for issuance upon the exercise of options, designated as either (i) ISOs under the Code, or (ii) nonqualified options, restricted stock, deferred stock or other stock-based awards. ISOs may be granted under the 2008 Plan to employees and officers of the Company. Non qualified options, restricted stock, deferred stock or other stock-based awards may be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Stock appreciation rights may also be issued in tandem with stock options. Unless the 2008 Plan is sooner terminated, the ability to grant options or other awards under the 2008 Plan will expire on August 27, 2018.

ISOs granted under the 2008 Plan may not be granted at a price less than the fair market value of the common stock on the date of grant (or 110% of fair market value in the case of persons holding 10% or more of the voting stock of the Company). Nonqualified options granted under the 2008 Plan may not be granted at a price less than the fair market value of the common stock. Options granted under the 2008 Plan expire not more than ten years from the date of grant (five years in the case of ISOs granted to persons holding 10% or more of the voting stock of the Company).

10

All stock options have been granted to employees and non-employees at exercise prices equal to or in excess of the market value on the date of the grant.

The Company determines the fair value of share based awards at the grant date by using the Black-Scholes option-pricing model, and is incorporating the simplified method to compute expected lives of share based awards with the following weighted-average assumptions:

Six Month Period Ended June 30,	2013			2012
Assumptions
Dividend Yield		0	%		0	%
Risk free interest rate		.85	%		0	%
Expected volatility		76	%		0	%
Expected lives		5 years			none

A summary of the activity for the Company's Plans for the indicated periods is presented below:

Stock Option Plan Totals	Shares			Weighted Average Exercise Price
Outstanding at December 31, 2011		3,435,443		$	1.22
· Cancelled		(8,313	)	$	1.10
· Exercised		(109,038	)	$	1.42
· Granted		30,843		$	3.27
Outstanding at December 31, 2012		3,348,935		$	1.23
· Cancelled		(8,617	)	$	1.10
· Exercised		(945,761	)	$	1.20
· Granted		50,000		$	4.25
Outstanding at June 30, 2013		2,444,557		$	1.31

The following is the weighted average contractual life in years and the weighted average exercise price at June 30, 2013 of:

			Weighted Average
	Number of		Remaining	Weighted Average
	Options		Contractual Life	Exercise Price
Options outstanding		2,444,557	4.6 years	$	1.31
Options vested		2,407,057	4.6 years	$	1.27

The following is the intrinsic value at June 30, 2013 of:

Options outstanding	$	4,673,382
Options vested in 2013	$	53,125
Options exercised in 2013	$	2,816,000

The intrinsic value of options exercised during the year ended December 31, 2012 was $267,000.

Note 3 - Debt

On June 22, 2012, a subsidiary of Hudson entered into a Revolving Credit, Term Loan and Security Agreement (the “PNC Facility”) with PNC Bank, National Association, as agent (“Agent” or “PNC”), and such other lenders as may thereafter become a party to the PNC Facility. Under the terms of the PNC Facility, Hudson could initially borrow up to $27,000,000 consisting of a term loan in the principal amount of $4,000,000 and revolving loans in a maximum amount up to the lesser of $23,000,000 and a borrowing base that is calculated based on the outstanding amount of Hudson’s eligible receivables and eligible inventory, as described in the PNC Facility. On February 15, 2013, the PNC Facility was amended. As a result of this amendment, Hudson may borrow up to a maximum of $40,000,000 consisting of a term loan in the principal amount of $4,000,000 and revolving loans in a maximum amount up to $36,000,000.  Amounts borrowed under the PNC Facility may be used by Hudson for working capital needs and to reimburse drawings under letters of credit. Fees and expenses relating to the creation of the PNC Facility of approximately $245,000 are being amortized over the life of the loan. At June 30, 2013, total borrowings under the PNC Facility were $28,187,000, and there was $7,179,000 available to borrow under the revolving line of credit. The effective interest rate under the PNC Facility was 2.5% at June 30, 2013. 

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Interest on loans under the PNC Facility is payable in arrears on the first day of each month with respect to loans bearing interest at the domestic rate (as set forth in the PNC Facility) and at the end of each interest period with respect to loans bearing interest at the Eurodollar rate (as set forth in the PNC Facility) or, for Eurodollar rate loans with an interest period in excess of three months, at the earlier of (a) each three months from the commencement of such Eurodollar rate loan or (b) the end of the interest period. Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to domestic rate loans, the sum of (i) a rate per annum equal to the higher of (1) the base commercial lending rate of PNC, (2) the federal funds open rate plus .5% and (3) the daily LIBOR plus 1%, plus (ii) .5% and (B) with respect to Eurodollar rate loans, the sum of the Eurodollar rate plus 2.25%.

Hudson granted to PNC, for itself, and as agent for such other lenders as may thereafter become a lender under the PNC Facility, a security interest in Hudson’s receivables, intellectual property, general intangibles, inventory and certain other assets.

The PNC Facility contains certain financial and non-financial covenants relating to Hudson, including limitations on Hudson’s ability to pay dividends on common stock or preferred stock, and also includes certain events of default, including payment defaults, breaches of representations and warranties, covenant defaults, cross-defaults to other obligations, events of bankruptcy and insolvency, certain ERISA events, judgments in excess of specified amounts, impairments to guarantees and a change of control. As of June 30, 2013, the Company was in compliance with all covenants in the PNC Facility.

The commitments under the PNC Facility will expire and the full outstanding principal amount of the loans, together with accrued and unpaid interest, are due and payable in full on June 22, 2015, unless the commitments are terminated and the outstanding principal amount of the loans are accelerated sooner following an event of default. 

Note 4 - Investment In Affiliates

In July 2011, the Company entered into a joint venture agreement with Safety Hi-Tech S.r.l (“SHT”) and with the principals of Banini-Binotti Associates (“BB”). The joint venture has created a new entity known as Hudson Technologies Europe, S.r.l. (“HTE”). The Company and SHT each own 40% of HTE with BB owning the remaining 20%. HTE’s purpose is to develop a business that provides for refrigerant reclamation, RefrigerantSide® services and energy optimization services throughout most of Europe, the Middle East and North Africa. As of June 30, 2013, the joint venture has begun limited operations. The Company intends to, over time, have each of its offerings that are available in the US made available in each of these geographies through the operations of HTE. As of June 30, 2013, the Company has made an initial investment of $515,000, of which $408,000 represents equipment purchased in prior years, and once the results of operations are deemed material, the Company’s share of the joint venture will be recorded under the equity method.

In August 2012, the Company entered into a joint venture agreement with SHT. The joint venture has created a new entity known as Safety Hi-Tech USA, LLC (“USA”). The Company and SHT each own 50% of USA. USA’s purpose is to develop a business that provides fire suppression and suppressants throughout North America and Mexico. As of June 30, 2013, the Company has made an investment of $650,000. As of June 30, 2013, the joint venture has not started operations.

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Item 2 - Management’s Discussion and Analysis of Financial Condition and Results of Operations

Certain statements contained in this section and elsewhere in this Form 10-Q constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements involve a number of known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Such factors include, but are not limited to, changes in the demand and price for refrigerants (including unfavorable market conditions adversely affecting the demand for, and the price of refrigerants), the Company's ability to source CFC and non-CFC based refrigerants, regulatory and economic factors, seasonality, competition, litigation, the nature of supplier or customer arrangements that become available to the Company in the future, adverse weather conditions, possible technological obsolescence of existing products and services, possible reduction in the carrying value of long-lived assets, estimates of the useful life of its assets, potential environmental liability, customer concentration, the ability to obtain financing, and other risks detailed in this report and in the Company's other periodic reports filed with the Securities and Exchange Commission (“SEC”). The words “believe”, “expect”, “anticipate”, “may”, “plan”, “should” and similar expressions identify forward-looking statements. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date the statement was made.

Critical Accounting Policies

The Company's discussion and analysis of its financial condition and results of operations are based upon its consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these consolidated financial statements requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities. Several of the Company's accounting policies involve significant judgments, uncertainties and estimations. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. To the extent that actual results differ from management's judgments and estimates, there could be a material adverse effect on the Company. On a continuous basis, the Company evaluates its estimates, including, but not limited to, those estimates related to its allowance for doubtful accounts, inventory reserves, and valuation allowance for the deferred tax assets relating to its net operating loss carry forwards (“NOLs”) and commitments and contingencies. With respect to accounts receivable, the Company estimates the necessary allowance for doubtful accounts based on both historical and anticipated trends of payment history and the ability of the customer to fulfill its obligations. For inventory, the Company evaluates both current and anticipated sales prices of its products to determine if a write down of inventory to net realizable value is necessary. In determining the Company’s valuation allowance for its deferred tax assets, the Company assesses its ability to generate taxable income in the future. The Company utilizes both internal and external sources to evaluate potential current and future liabilities for various commitments and contingencies. In the event that the assumptions or conditions change in the future, the estimates could differ from the original estimates.

Overview

Sales of refrigerants continue to represent a significant portion of the Company’s revenues. The Company’s refrigerant sales are primarily HCFC and HFC based refrigerants and to a lesser extent CFC based refrigerants that are no longer manufactured. Effective January 1, 1996, the Clean Air Act (the “Act”) prohibited the production of virgin CFC refrigerants and limited the production of virgin HCFC refrigerants. Effective January 2004, the Act further limited the production of virgin HCFC refrigerants and federal regulations were enacted which established production and consumption allowances for HCFC refrigerants and which imposed limitations on the importation of certain virgin HCFC refrigerants. Under the Act, production of certain virgin HCFC refrigerants is scheduled to be phased out during the period 2010 through 2020, and production of all virgin HCFC refrigerants is scheduled to be phased out by 2030. Additionally, effective January 1, 2010, the Act further limited the production of virgin HCFC refrigerants, and additional federal regulations were enacted which imposed further limitation and a phase down on the use, production and importation of virgin HCFC refrigerants for the years 2010 through 2014. As a result of litigation, the federal regulations implementing the January 2010 phase down schedule were vacated, and in March 2013, the Environmental Protection Agency (“EPA”) published a final rule providing for further reduction in the production of HCFC refrigerants when compared to the reductions established in the January 1, 2010 published rule. The final rule allows for the production or importation of 63 million and 51 million pounds of HCFC-22 in 2013 and 2014, respectively. The Company believes that the production permitted by the final rule has created an oversupply of HCFC-22 during the 2013 cooling season. The Company believes that this oversupply has resulted in a reduction in the market price of HCFC-22. To the extent that the oversupply exceeds the demand for HCFC-22 for the foreseeable future, the Company expects further declines in the market price of HCFC-22, which could result in additional loss of revenues and impairment of the value of its HCFC-22 inventory. Such change in revenues or inventory value could have a material adverse effect on the Company’s operating results and financial position.

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The EPA has not yet issued a proposed or final rule establishing the total pounds of HCFC-22 that can be produced or imported for the period 2015 through 2019. The Company expects this final rule to have a material impact on the Company’s operating results and financial position.

The Company has created and developed a service offering known as RefrigerantSide® Services. RefrigerantSide® Services are sold to contractors and end-users whose refrigeration systems are used in commercial air conditioning and industrial processing. These services are offered in addition to refrigerant sales and the Company's traditional refrigerant management services, which consist primarily of reclamation of refrigerants. The Company has created a network of service depots that provide a full range of the Company's RefrigerantSide® Services to facilitate the growth and development of its service offerings.

The Company focuses its sales and marketing efforts for its RefrigerantSide® Services on customers who the Company believes most readily appreciate and understand the value that is provided by its RefrigerantSide® Services offering. In pursuing its sales and marketing strategy, the Company offers its RefrigerantSide® Services to customers in the following industries: petrochemical, pharmaceutical, industrial power, manufacturing, commercial facility and property management and maritime. The Company may incur additional expenses as it develops its RefrigerantSide® Services offering.

Results of Operations

Three month period ended June 30, 2013 as compared to the three month period ended June 30, 2012

Revenues for the three month period ended June 30, 2013 were $15,768,000, a decrease of $6,483,000 or 29% from the $22,251,000 reported during the comparable 2012 period. The decrease in revenues was primarily attributable to a decrease in refrigerant revenues of $6,656,000 partially offset by an increase in RefrigerantSide® Services revenues of $173,000. The decrease in refrigerant revenue is primarily related to a decrease in the number of pounds of certain refrigerants sold when compared to the same period in 2012. The increase in RefrigerantSide® Services was attributable to both an increase in the number of jobs completed and an increase in the price of jobs completed when compared to the same period in 2012.

Cost of sales for the three month period ended June 30, 2013 was $13,220,000, an increase of $1,206,000 or 10% from the $12,014,000 reported during the comparable 2012 period. The increase in cost of sales was primarily due to an increase in the cost per pound of refrigerants sold in 2013 when compared to the same period in 2012. As a percentage of sales, cost of sales was 84% of revenues for 2013 compared to 54% for the comparable 2012 period.

Operating expenses for the three month period ended June 30, 2013 were $1,774,000, an increase of $6,000 from the $1,768,000 reported during the comparable 2012 period. The increase in operating expenses are due to an increase in selling expenses of $145,000, primarily due to increased selling payroll costs, offset by a decrease in general and administrative expenses of $139,000, primarily due to a decrease in administrative payroll accruals, when compared to the same period in 2012.

Other income (expense) for the three month period ended June 30, 2013 was ($243,000), compared to the ($186,000) reported during the comparable 2012 period. Other income (expense) includes interest expense of $243,000 and $187,000 for the comparable 2013 and 2012 periods, respectively. The increase in interest expense is due to increased borrowing on the PNC credit facility.

Income tax provision for the three month period ended June 30, 2013 and 2012 was $197,000 and $3,148,000, respectively. The respective income tax provisions were for federal and state income tax at statutory rates.

Net income for the three month period ended June 30, 2013 was $334,000, a decrease of $4,801,000 from the $5,135,000 net income reported during the comparable 2012 period, primarily due to decreased revenues and gross profit, partially offset by decreased income tax expenses.

Six month period ended June 30, 2013 as compared to the six month period ended June 30, 2012

Revenues for the six month period ended June 30, 2013 were $38,645,000, an increase of $1,540,000 or 4% from the $37,105,000 reported during the comparable 2012 period. The increase in revenues was primarily attributable to an increase in refrigerant revenues of $1,492,000 and an increase in RefrigerantSide® Services revenues of $48,000. The increase in refrigerant revenue is primarily related to an increase in the selling price per pound of certain refrigerants sold, which accounted for an increase in revenues of $8,610,000, offset in part by a decrease in the number of pounds of certain refrigerants sold, which accounted for a decrease in revenues of $7,118,000. The increase in RefrigerantSide® Services was attributable to an increase in the number of jobs completed offset by a decrease in the price of jobs completed when compared to the same period in 2012.

Cost of sales for the six month period ended June 30, 2013 was $26,935,000, an increase of $6,035,000 or 29% from the $20,900,000 reported during the comparable 2012 period. The increase in cost of sales was primarily due to an increase in the cost per pound of refrigerants sold in 2013 when compared to the same period in 2012. As a percentage of sales, cost of sales was 70% of revenues for 2013 compared to 56% for the comparable 2012 period.

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Operating expenses for the six month period ended June 30, 2013 were $3,531,000, an increase of $13,000 from the $3,518,000 reported during the comparable 2012 period. The increase in operating expenses are due to an increase in selling expenses of $287,000 primarily due to increased selling payroll costs, offset by a decrease in general and administrative expenses of $274,000 primarily due to a decrease in administrative payroll accruals.

Other income (expense) for the six month period ended June 30, 2013 was ($440,000), compared to the ($357,000) reported during the comparable 2012 period. Other income (expense) includes interest expense of $440,000 and $358,000 for the comparable 2013 and 2012 periods, respectively. The increase in interest expense is due to increased borrowing on the PNC credit facility.

Income tax provision for the six month period ended June 30, 2013 and 2012 was $2,936,000 and $4,686,000, respectively. The respective income tax provisions were for federal and state income tax at statutory rates.

Net income for the six month period ended June 30, 2013 was $4,803,000, a decrease of $2,841,000 from the $7,644,000 net income reported during the comparable 2012 period, primarily due to decreased revenues and gross profit, partially offset by decreased income tax expenses.

Liquidity and Capital Resources

At June 30, 2013, the Company had working capital, which represents current assets less current liabilities, of $33,654,000, an increase of $6,246,000 from the working capital of $27,408,000 at December 31, 2012. The increase in working capital is primarily attributable to net income for the period.

Inventory and trade receivables are principal components of current assets. At June 30, 2013, the Company had inventories of $51,298,000, an increase of $11,131,000 from $40,167,000 at December 31, 2012. The increase in the inventory balance is due to the increased cost of HCFC refrigerants, which are currently being phased down by the EPA, as well as the timing and availability of inventory purchases and the sale of refrigerants. The Company's ability to sell and replace its inventory on a timely basis and the prices at which it can be sold are subject, among other things, to current market conditions and the nature of supplier or customer arrangements and the Company's ability to source CFC based refrigerants (which are no longer being produced), HCFC refrigerants (which are currently being phased down leading to a full phase out of virgin production), or non-CFC based refrigerants. At June 30, 2013, the Company had trade receivables, net of allowance for doubtful accounts, of $11,866,000, an increase of $9,910,000 from $1,956,000 at December 31, 2012. The Company's trade receivables are concentrated with various wholesalers, brokers, contractors and end-users within the refrigeration industry that are primarily located in the continental United States.

The Company has historically financed its working capital requirements through cash flows from operations, the issuance of debt and equity securities, and bank borrowings.

Net cash used by operating activities for the six month period ended June 30, 2013, was $13,830,000 compared with net cash used by operating activities of $3,537,000 for the comparable 2012 period. Net cash used by operating activities for the 2013 period was primarily attributable to increases in inventory and accounts receivable, offset by net income and an increase in accounts payable.

Net cash used by investing activities for the six month period ended June 30, 2013, was $540,000 compared with net cash used by investing activities of $556,000 for the comparable 2012 period. The net cash used by investing activities for the 2013 period was primarily related to investment in general purpose equipment for the Company’s Champaign, Illinois facility.

Net cash provided by financing activities for the six month period ended June 30, 2013, was $12,753,000 compared with net cash provided by financing activities of $4,143,000 for the comparable 2012 period. The net cash provided by financing activities for the 2013 period was primarily due to an increase in short term borrowing and, to a lesser extent, the issuance of common stock upon the exercise of employee stock options.

At June 30, 2013, the Company had cash and cash equivalents of $2,374,000. The Company continues to assess its capital expenditure needs. The Company may, to the extent necessary, continue to utilize its cash balances to purchase equipment primarily for its operations. The Company estimates that the total capital expenditures for 2013 will be approximately $2,500,000.

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The following is a summary of the Company's significant contractual cash obligations for the periods indicated that existed as of June 30, 2013 (in 000’s):

	Six Month Period Ended June 30,
Long and short term debt and capital lease obligations:	2014		2015		2016		2017		2018 & Thereafter		Total
Principal	$	24,475	$	4,296	$	282	$	246	$	0	$	29,299
Estimated interest (1) (2)		742		732		16		4		0		1,494
Operating leases		736		462		298		127		127		1,750
Total contractual cash obligations	$	25,953	$	5,490	$	596	$	377	$	127	$	32,543

(1) The estimated interest payments on revolving debt are based on the interest rates in effect and the outstanding revolving debt obligation as of June 30, 2013 through the expiration of the PNC Facility on June 22, 2015.

(2) The estimated future interest payments on all debt other than revolving debt are based on the respective interest rates applied to the declining principal balances on each of the notes.

On June 22, 2012, a subsidiary of Hudson entered into the PNC Facility. Under the terms of the PNC Facility, Hudson could initially borrow up to $27,000,000 consisting of a term loan in the principal amount of $4,000,000 and revolving loans in a maximum amount up to the lesser of $23,000,000 and a borrowing base that is calculated based on the outstanding amount of Hudson’s eligible receivables and eligible inventory, as described in the PNC Facility. On February 15, 2013, the PNC Facility was amended. As a result of this amendment, Hudson may borrow up to a maximum of $40,000,000 consisting of a term loan in the principal amount of $4,000,000 and revolving loans in a maximum amount up to $36,000,000. Amounts borrowed under the PNC Facility may be used by Hudson for working capital needs and to reimburse drawings under letters of credit. At June 30, 2013, total borrowings under the PNC Facility were $28,187,000, and there was $7,179,000 available to borrow under the revolving line of credit. The effective interest rate under the PNC Facility was 2.5% at June 30, 2013.

Interest on loans under the PNC Facility is payable in arrears on the first day of each month with respect to loans bearing interest at the domestic rate (as set forth in the PNC Facility) and at the end of each interest period with respect to loans bearing interest at the Eurodollar rate (as set forth in the PNC Facility) or, for Eurodollar rate loans with an interest period in excess of three months, at the earlier of (a) each three months from the commencement of such Eurodollar rate loan or (b) the end of the interest period. Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to domestic rate loans, the sum of (i) a rate per annum equal to the higher of (1) the base commercial lending rate of PNC, (2) the federal funds open rate plus .5% and (3) the daily LIBOR plus 1%, plus (ii) .5% and (B) with respect to Eurodollar rate loans, the sum of the Eurodollar rate plus 2.25%.

Hudson granted to PNC, for itself, and as agent for such other lenders as thereafter may become a lender under the PNC Facility, a security interest in Hudson’s receivables, intellectual property, general intangibles, inventory and certain other assets.

The PNC Facility contains certain financial and non-financial covenants relating to Hudson, including limitations on Hudson’s ability to pay dividends on common stock or preferred stock, and also includes certain events of default, including payment defaults, breaches of representations and warranties, covenant defaults, cross-defaults to other obligations, events of bankruptcy and insolvency, certain ERISA events, judgments in excess of specified amounts, impairments to guarantees and a change of control.

The commitments under the PNC Facility will expire and the full outstanding principal amount of the loans, together with accrued and unpaid interest, are due and payable in full on June 22, 2015, unless the commitments are terminated and the outstanding principal amount of the loans are accelerated sooner following an event of default. 

The PNC Facility contains a financial covenant to maintain at all times a Fixed Charge Coverage Ratio of not less than 1.10 to 1.00, tested quarterly on a rolling twelve month basis. Fixed Charge Coverage Ratio is defined in the PNC Facility, with respect to any fiscal period, the ratio of (a) EBITDA of Hudson for such period, minus unfinanced capital expenditures (as defined in the PNC Facility) made by Hudson during such period, minus the aggregate amount of cash taxes paid by Hudson during such period, minus the aggregate amount of dividends and distributions made by Hudson during such period, minus the aggregate amount of payments made with cash by Hudson to satisfy soil sampling and reclamation related to environmental clean’up at the Company’s former Hillburn, NY facility during such period (to the extent not already included in the calculation of EBITDA as determined by the Agent) to (b) the aggregate amount of all principal payments due and/or made, except principal payments related to outstanding revolving advances with regard to all funded debt (as defined in the PNC Facility) of Hudson during such period, plus the aggregate interest expense of Hudson during such period. EBITDA as defined in the PNC Facility shall mean for any period the sum of (i) earnings before interest and taxes for such period plus (ii) depreciation expenses for such period, plus (iii) amortization expenses for such period, plus (iv) non-cash charges. As of June 30, 2013, the Company was in compliance with all covenants in the PNC Facility. The Company’s ability to comply with these covenants in future quarters may be affected by events beyond the Company’s control, including general economic conditions and refrigerant pricing.. See “Overview” above.

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On July 7, 2010, the Company sold 2,737,500 units, with the aggregate units consisting of 2,737,500 shares of the Company’s common stock and warrants to purchase 1,368,750 shares, at a price of $2.00 per unit pursuant to the Company’s shelf registration and received net proceeds of approximately $4,900,000 (“2010 Offering”). The warrants issued as part of the 2010 Offering have an exercise price of $2.60 per share and were initially exercisable for a five-year period. Effective as of March 4, 2011, the Company repurchased warrants to purchase 150,000 shares of the Company’s common stock, at a price of $0.60 per warrant. In March 2011 the expiration date of the remaining warrants was extended to July 7, 2016. The value of the aggregate number of warrants issued pursuant to the 2010 Offering was approximately $1,300,000 and such amount was charged as a component of stockholders’ equity to additional paid in capital. In March 2012, warrants to purchase 50,000 shares of the Company’s common stock were exercised on a “net exercise” basis and the Company issued 7,349 shares of common stock in exchange for the warrants surrendered. As a result of the repurchase, and the exercise of 50,000 warrants, there are 1,168,750 warrants outstanding.

On June 1, 2012, the Company entered into a mortgage note with Busey Bank for $855,000. The note bears interest at the fixed rate of 4% per annum, amortizing over 60 months and maturing on June 1, 2017. The mortgage note is secured by the Company’s land and building located in Champaign, Illinois. As of June 30, 2013, the outstanding principal balance of this mortgage note was $685,000.

The Company believes that it will be able to satisfy its working capital requirements for the foreseeable future from anticipated cash flows from operations and available funds under the PNC Facility. Any unanticipated expenses, including, but not limited to, an increase in the cost of refrigerants purchased by the Company, an increase in operating expenses or failure to achieve expected revenues from the Company's RefrigerantSide® Services and/or refrigerant sales or additional expansion or acquisition costs that may arise in the future would adversely affect the Company's future capital needs. There can be no assurance that the Company's proposed or future plans will be successful, and as such, the Company may require additional capital sooner than anticipated, which capital may not be available.

Inflation

Inflation has not historically had a material impact on the Company's operations.

Reliance on Suppliers and Customers

The Company participates in an industry that is highly regulated, changes in which could affect operating results. Currently the Company purchases virgin, hydrochlorofluorocarbon (“HCFC”) and hydrofluorocarbon (“HFC”) refrigerants and reclaimable, primarily HCFC and chlorofluorocarbon (“CFC”), refrigerants from suppliers and its customers. To the extent that the Company is unable to source sufficient quantities of refrigerants or is unable to obtain refrigerants on commercially reasonable terms or experiences a decline in demand and/or price for refrigerants sold by it, the Company could realize reductions in revenue from refrigerant sales, which could have a material adverse effect on the Company’s operating results and financial position.

For the six month period ended June 30, 2013, two customers each accounted for 10% or more of the Company’s revenues and in the aggregate these two customers accounted for 29% of the Company’s revenues. At June 30, 2013, there were $1,800,000 in outstanding receivables from these customers. For the six month period ended June 30, 2012, three customers each accounted for 10% or more of the Company’s revenues and in the aggregate these three customers accounted for 40% of the Company’s revenues. At June 30, 2012, there were $3,300,000 in outstanding receivables from these customers.

The loss of a principal customer or a decline in the economic prospects of and/or a reduction in purchases of the Company's products or services by any such customer could have a material adverse effect on the Company's operating results and financial position.

Seasonality and Weather Conditions and Fluctuations in Operating Results

The Company's operating results vary from period to period as a result of weather conditions, requirements of potential customers, non-recurring refrigerant and service sales, availability and price of refrigerant products (virgin or reclaimable), changes in reclamation technology and regulations, timing in introduction and/or retrofit or replacement of CFC and non CFC based refrigeration equipment, the rate of expansion of the Company's operations, and by other factors. The Company's business is seasonal in nature with peak sales of refrigerants occurring in the first half of each year. During past years, the seasonal decrease in sales of refrigerants has resulted in losses particularly in the fourth quarter of the year. During the second quarter of 2013, cool spring weather negatively impacted the demand for refrigerants and resulted in reductions in the Company’s refrigerant revenues, which adversely affected the Company’s results of operations. Delays or inability in securing adequate supplies of refrigerants at peak demand periods, lack of refrigerant demand, increased expenses, declining refrigerant prices and a loss of a principal customer could result in significant losses. There can be no assurance that the foregoing factors will not occur and result in a material adverse effect on the Company's financial position and significant losses. The Company believes that to a lesser extent there is a similar seasonal element to RefrigerantSide® Service revenues as refrigerant sales. The Company is continuing to assess its RefrigerantSide® Service revenues seasonal trend.

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Recent Accounting Pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2013-2 (“ASU 2013-2”), “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Topic 220).” ASU 2013-2 requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. ASU 2013-2 became effective for fiscal years beginning after December 31, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statements.

In March 2013, the FASB issued Accounting Standards Update 2013-5 (“ASU 2013-5”), “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups within a Foreign Entity or of an Investment in a Foreign Entity (Topic 830),” ASU 2013-5 requires entities that cease to hold a controlling financial interest (as described in Subtopic 810-10) in a subsidiary or group of assets within a foreign entity when (1) the subsidiary or group of assets is a nonprofit activity or a business (other than a sale in substance of real estate or conveyance of oil and gas mineral rights) and (2) there is a cumulative translation adjustment balance associated with that foreign entity. The amendments also affect entities that lose a controlling financial interest in an investment in a foreign entity (by sale or other transfer event) and those that acquire a business in stages (sometimes also referred to as a step acquisition) by increasing an investment in a foreign entity from one accounted for under the equity method to one accounted for as a consolidated investment. ASU 2013-5 will become effective prospectively for fiscal years (and interim reporting periods within those years) beginning after December 15, 2013. The Company does not anticipate that this update will have a material impact on the Company’s consolidated financial statements.

Item 3 - Quantitative and Qualitative Disclosures about Market Risk

Interest Rate Sensitivity

We are exposed to market risk primarily from fluctuations in interest rates on the PNC Facility. The PNC Facility is a $40,000,000 secured facility. Interest on loans under the PNC Facility is payable in arrears on the first day of each month with respect to loans bearing interest at the domestic rate (as set forth in the PNC Facility) and at the end of each interest period with respect to loans bearing interest at the Eurodollar rate (as set forth in the PNC Facility) or, for Eurodollar rate loans with an interest period in excess of three months, at the earlier of (a) each three months from the commencement of such Eurodollar rate loan or (b) the end if he interest period. Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to domestic rate loans, the sum of (i) a rate per annum equal to the higher of (1) the base commercial lending rate of PNC, (2) the federal funds open rate plus .5% and (3) the daily LIBOR plus 1%, plus (ii) .5% and (B) with respect to Eurodollar rate loans, the sum of the Eurodollar rate plus 2.25%. The outstanding balance on the PNC Facility as of June 30, 2013 was $28,187,000. Future interest rate changes on our borrowing under the PNC Facility may have an impact on our consolidated results of operations.

Item 4 - Controls and Procedures

Disclosure Controls and Procedures

The Company, under the supervision and with the participation of the Company’s management, including the Company’s Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the Company’s disclosure controls and procedures, as defined in Rule 13a-15(e) of the Securities Exchange Act of 1934, as amended (“Exchange Act”), as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and the Chief Financial Officer have concluded that the Company’s disclosure controls and procedures provide reasonable assurance that they are effective to ensure that information required to be disclosed in reports filed under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the Securities and Exchange Commission, and that such information is accumulated and communicated to the Company’s management, including its principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. Because of the inherent limitations in all control systems, any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily is required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. Furthermore, the Company’s controls and procedures can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the control and misstatements due to error or fraud may occur and not be detected on a timely basis.

18

Changes in Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting (as defined in Rule 13a-15(f) of the Exchange Act) in the quarter ended June 30, 2013 that materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

19

PART II – OTHER INFORMATION

Item 1 - Legal Proceedings

For information regarding pending legal matters, refer to the Legal Proceedings Section in Part I, Item 3 of the Company’s Form 10-K for the year ended December 31, 2012.

Item 6 - Exhibits

Exhibit Number	Description
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of 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	Interactive Data Files Pursuant to Rule 405 of Regulation S-T

20

SIGNATURES

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

HUDSON TECHNOLOGIES, INC.

By:	/s/ Kevin J. Zugibe	August 6, 2013
	Kevin J. Zugibe	Date
	Chairman and
	Chief Executive Officer
By:	/s/ James R. Buscemi	August 6, 2013
	James R. Buscemi	Date
	Chief Financial Officer

21

Index to Exhibits

Exhibit Number	Description
31.1	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of 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	Interactive Data Files Pursuant to Rule 405 of Regulation S-T

22

EX-31.1

Exhibit 31.1:

Hudson Technologies, Inc.

Certification of Principal Executive Officer

I, Kevin J. Zugibe, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Hudson Technologies, 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: August 6, 2013

/s/ Kevin J. Zugibe

Kevin J. Zugibe

Chief Executive Officer and

Chairman of the Board

EX-31.2

Exhibit 31.2:

Hudson Technologies, Inc.

Certification of Principal Financial Officer

I, James R. Buscemi, certify that:

1.	I have reviewed this quarterly report on Form 10-Q of Hudson Technologies, 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: August 6, 2013

/s/ James R. Buscemi

James R. Buscemi

Chief Financial Officer

EX-32.1

Exhibit 32.1:

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Hudson Technologies, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”),

I, Kevin J. Zugibe, as Chief Executive Officer and Chairman of the Board of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Kevin J. Zugibe

Kevin J. Zugibe

Chief Executive Officer and

Chairman of the Board

August 6, 2013

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Hudson Technologies, Inc. (the “Company”) on Form 10-Q for the period ended June 30, 2013 as filed with the Securities and Exchange Commission on the date hereof (the “Report”),

I, James R. Buscemi, as Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ James R. Buscemi

James R. Buscemi

Chief Financial Officer

August 6, 2013

XML

Weighted Average Assumptions Used in Determining Fair Value of Share Based Awards at Grant Date by Using Black-Scholes Option Pricing Model (Detail)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Dividend Yield	0.00%	0.00%
Risk free interest rate	0.85%	0.00%
Expected volatility	76.00%	0.00%
Expected lives	5 years	0 years

XML

Consolidated Income Statements (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues	$ 15,768	$ 22,251	$ 38,645	$ 37,105
Cost of sales	13,220	12,014	26,935	20,900
Gross Profit	2,548	10,237	11,710	16,205
Operating expenses:
Selling and marketing	818	673	1,641	1,354
General and administrative	956	1,095	1,890	2,164
Total operating expenses	1,774	1,768	3,531	3,518
Operating income	774	8,469	8,179	12,687
Other income (expense):
Interest expense	(243)	(187)	(440)	(358)
Interest income	0	1	0	1
Total other income (expense)	(243)	(186)	(440)	(357)
Income before income taxes	531	8,283	7,739	12,330
Income tax expense	197	3,148	2,936	4,686
Net income	$ 334	$ 5,135	$ 4,803	$ 7,644
Net income per common share - Basic	$ 0.01	$ 0.22	$ 0.20	$ 0.32
Net income per common share - Diluted	$ 0.01	$ 0.20	$ 0.18	$ 0.29
Weighted average number of shares outstanding - Basic	24,891,115	23,841,996	24,605,541	23,813,776
Weighted average number of shares outstanding - Diluted	26,859,009	26,177,960	26,670,232	26,149,740

XML

Summary of significant accounting policies (Policies)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Business

Business

Hudson Technologies, Inc., incorporated under the laws of New York on January 11, 1991, is a refrigerant services company providing innovative solutions to recurring problems within the refrigeration industry. The Company's products and services are primarily used in commercial air conditioning, industrial processing and refrigeration systems, including (i) refrigerant sales, (ii) refrigerant management services consisting primarily of reclamation of refrigerants and (iii) RefrigerantSide® Services performed at a customer's site, consisting of system decontamination to remove moisture, oils and other contaminants. In addition, RefrigerantSide® Services include predictive and diagnostic services for industrial and commercial refrigeration applications, which are designed to predict potential catastrophic problems and identify inefficiencies in an operating system. The Company’s Chiller Chemistry®, Chill Smart®, Fluid Chemistry®, and Performance Optimization are predictive and diagnostic service offerings. As a component of the Company’s products and services, the Company also participates in the generation of carbon offset projects. The Company operates principally through its wholly-owned subsidiary, Hudson Technologies Company. Unless the context requires otherwise, references to the “Company”, “Hudson”, “we”, “us”, “our”, or similar pronouns refer to Hudson Technologies, Inc. and its subsidiaries.

In preparing the accompanying consolidated financial statements, and in accordance with ASC855-10 “Subsequent Events”, the Company’s management has evaluated subsequent events through the date that the financial statements were filed.

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial statements and with the instructions of Regulation S-X. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. The financial information included in the quarterly report should be read in conjunction with the Company’s audited financial statements and related notes thereto for the year ended December 31, 2012. Operating results for the six month period ended June 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.

In the opinion of management, all estimates and adjustments considered necessary for a fair presentation have been included and all such adjustments were normal and recurring.

Consolidation

Consolidation

The consolidated financial statements represent all companies of which Hudson directly or indirectly has majority ownership or otherwise controls. Significant intercompany accounts and transactions have been eliminated. The Company's consolidated financial statements include the accounts of wholly-owned subsidiaries Hudson Holdings, Inc. and Hudson Technologies Company.

Fair value of financial instruments

Fair value of financial instruments

The carrying values of financial instruments including trade accounts receivable and accounts payable approximate fair value at June 30, 2013 and December 31, 2012, because of the relatively short maturity of these instruments. The carrying value of short and long-term debt approximates fair value, based upon quoted market rates of similar debt issues, as of June 30, 2013 and December 31, 2012.

Credit risk

Credit risk

Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of temporary cash investments and trade accounts receivable. The Company maintains its temporary cash investments in highly-rated financial institutions and, at times, the balances exceed FDIC insurance coverage. The Company's trade accounts receivables are primarily due from companies throughout the United States. The Company reviews each customer's credit history before extending credit.

The Company establishes an allowance for doubtful accounts based on factors associated with the credit risk of specific accounts, historical trends, and other information. The carrying value of the Company’s accounts receivable is reduced by the established allowance for doubtful accounts. The allowance for doubtful accounts includes any accounts receivable balances that are determined to be uncollectible, along with a general reserve for the remaining accounts receivable balances. The Company adjusts its reserves based on factors that affect the collectability of the accounts receivable balances.

For the six month period ended June 30, 2013, two customers each accounted for 10% or more of the Company’s revenues and in the aggregate these two customers accounted for 29% of the Company’s revenues. At June 30, 2013, there were $1,800,000 in outstanding receivables from these customers. For the six month period ended June 30, 2012, three customers each accounted for 10% or more of the Company’s revenues and in the aggregate these three customers accounted for 40% of the Company’s revenues. At June 30, 2012, there were $3,300,000 in outstanding receivables from these customers.

The loss of a principal customer or a decline in the economic prospects of and/or a reduction in purchases of the Company's products or services by any such customer could have a material adverse effect on the Company's operating results and financial position.

Cash and cash equivalents

Cash and cash equivalents

Temporary investments with original maturities of ninety days or less are included in cash and cash equivalents.

Inventories

Inventories

Inventories, consisting primarily of refrigerant products available for sale, are stated at the lower of cost, on a first-in first-out basis, or market.

Property, plant, and equipment

Property, plant, and equipment

Property, plant, and equipment are stated at cost, including internally manufactured equipment. The cost to complete equipment that is under construction is not considered to be material to the Company's financial position. Provision for depreciation is recorded (for financial reporting purposes) using the straight-line method over the useful lives of the respective assets. Leasehold improvements are amortized on a straight-line basis over the shorter of economic life or terms of the respective leases. Costs of maintenance and repairs are charged to expense when incurred.

Due to the specialized nature of the Company's business, it is possible that the Company's estimates of equipment useful life periods may change in the future.

Revenues and cost of sales

Revenues and cost of sales

Revenues are recorded upon completion of service or product shipment and passage of title to customers in accordance with contractual terms. The Company evaluates each sale to ensure collectability. In addition, each sale is based on an arrangement with the customer and the sales price to the buyer is fixed. License fees are recognized over the period of the license based on the respective performance measurements associated with the license. Royalty revenues are recognized when earned. Cost of sales is recorded based on the cost of products shipped or services performed and related direct operating costs of the Company's facilities. To the extent that the Company charges its customers shipping fees, such amounts are included as a component of revenue and the corresponding costs are included as a component of cost of sales.

The Company's revenues are derived from refrigerant and reclamation sales and RefrigerantSide® Services, including license and royalty revenues. The revenues for each of these lines are as follows:

Six Month Period Ended June 30,	2013		2012
(in thousands, unaudited)
Refrigerant and reclamation sales	$	36,268	$	34,776
RefrigerantSide® services		2,377		2,329
Total	$	38,645	$	37,105

Income taxes

Income taxes

The Company utilizes the asset and liability method for recording deferred income taxes, which provides for the establishment of deferred tax asset or liability accounts based on the difference between tax and financial reporting bases of certain assets and liabilities. The tax benefit associated with the Company's net operating loss carry forwards (“NOLs”) is recognized to the extent that the Company is expected to recognize future taxable income. The Company assesses the recoverability of its deferred tax assets based on its expectation that it will recognize future taxable income and adjusts its valuation allowance accordingly. As of June 30, 2013 and December 31, 2012, the net deferred tax asset was $3,625,000 and $4,122,000, respectively.

Certain states either do not allow or limit NOLs and as such the Company will be liable for certain state taxes. To the extent that the Company utilizes its NOLs, it will not pay tax on such income but may be subject to the federal alternative minimum tax. In addition, to the extent that the Company’s net income, if any, exceeds the annual NOL limitation it will pay income taxes based on existing statutory rates. Moreover, as a result of a “change in control”, as defined by the Internal Revenue Service, the Company’s ability to utilize its existing NOLs is subject to certain annual limitations. TheCompany’s NOLs are subject to annual limitations of $1,300,000.

As a result of an Internal Revenue Service audit, the 2006 and prior federal tax years have been closed. The Company operates in many states throughout the United States and, as of June 30, 2013, the various states’ statutes of limitations remain open for tax years subsequent to 2008. The Company recognizes interest and penalties, if any, relating to income taxes as a component of the provision for income taxes.

The Company evaluates uncertain tax positions, if any, by determining if it is more likely than not to be sustained upon examination by the taxing authorities. As of June 30, 2013 and December 31, 2012, the Company had no uncertain tax positions.

Income per common and equivalent shares

Income per common and equivalent shares

If dilutive, common equivalent shares (common shares assuming exercise of options and warrants) utilizing the treasury stock method are considered in the presentation of diluted earnings per share. The reconciliation of shares used to determine net income per share is as follows (dollars in thousands, unaudited):

	Three Month Period Ended June 30,				Six Month Period Ended June 30,
	2013		2012		2013		2012
Net Income	$	334	$	5,135	$	4,803	$	7,644
Weighted average number of shares – basic		24,891,115		23,841,996		24,605,541		23,813,776
Weighted average number of shares underlying warrants		383,123		277,867		432,705		277,867
Weighted average number of shares underlying options		1,584,771		2,058,097		1,631,986		2,058,097
Weighted average number of shares outstanding – diluted		26,859,009		26,177,960		26,670,232		26,149,740

During the three and six month periods ended June 30, 2013 and 2012, certain options and warrants aggregating 50,000 and no shares, respectively, have been excluded from the calculation of diluted shares, due to the fact that their effect would be anti-dilutive.

Estimates and risks

Estimates and risks

The preparation of financial statements in conformity with generally accepted accounting principles in the United States requires management to make estimates and assumptions that affect reported amounts of certain assets and liabilities, the disclosure of contingent assets and liabilities, and the results of operations during the reporting period. Actual results could differ from these estimates.

The Company utilizes both internal and external sources to evaluate potential current and future liabilities for various commitments and contingencies. In the event that the assumptions or conditions change in the future, the estimates could differ from the original estimates.

Several of the Company's accounting policies involve significant judgments, uncertainties and estimations. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. To the extent that actual results differ from management's judgments and estimates, there could be a material adverse effect on the Company. On a continuous basis, the Company evaluates its estimates, including, but not limited to, those estimates related to its allowance for doubtful accounts, inventory reserves, and valuation allowance for the deferred tax assets relating to its NOLs and commitments and contingencies. With respect to accounts receivable, the Company estimates the necessary allowance for doubtful accounts based on both historical and anticipated trends of payment history and the ability of the customer to fulfill its obligations. For inventory, the Company evaluates both current and anticipated sales prices of its products to determine if a write down of inventory to net realizable value is necessary. In determining the Company’s valuation allowance for its deferred tax assets, the Company assesses its ability to generate taxable income in the future.

The Company participates in an industry that is highly regulated, changes in which could affect operating results. Currently the Company purchases virgin, hydrochlorofluorocarbon (“HCFC”) and hydrofluorocarbon (“HFC”) refrigerants and reclaimable, primarily HCFC and chlorofluorocarbon (“CFC”), refrigerants from suppliers and its customers. Effective January 1, 1996, the Clean Air Act (the “Act”) prohibited the production of virgin CFC refrigerants and limited the production of virgin HCFC refrigerants. Effective January 2004, the Act further limited the production of virgin HCFC refrigerants and federal regulations were enacted which established production and consumption allowances for HCFC refrigerants and which imposed limitations on the importation of certain virgin HCFC refrigerants. Under the Act, production of certain virgin HCFC refrigerants is scheduled to be phased out during the period 2010 through 2020, and production of all virgin HCFC refrigerants is scheduled to be phased out by 2030. Additionally, effective January 1, 2010, the Act further limited the production of virgin HCFC refrigerants, and additional federal regulations have been enacted which imposed further limitation and a phase down on the use, production and importation of virgin HCFC refrigerants for the years 2010 through 2014. As a result of litigation, the federal regulations implementing the January 2010 phase down schedule were vacated, and in March 2013, the Environmental Protection Agency (“EPA”) published a final rule providing for further reduction in the production of HCFC refrigerants when compared to the reductions established in the January 1, 2010 published rule. The final rule allows for the production or importation of 63 million and 51 million pounds of HCFC-22 in 2013 and 2014, respectively. The EPA has not yet issued a proposed or final rule establishing the total pounds of HCFC-22 that can be produced or imported during the years 2015 through 2019.

To the extent that the Company is unable to source sufficient quantities of refrigerants or is unable to obtain refrigerants on commercially reasonable terms or experiences a decline in demand and/or price for refrigerants sold by it, the Company could realize reductions  in revenue from refrigerant sales, which could have a material adverse effect on the Company’s operating results and financial position. 

The Company is subject to various legal proceedings. The Company assesses the merit and potential liability associated with each of these proceedings. In addition, the Company estimates potential liability, if any, related to these matters. To the extent that these estimates are not accurate, or circumstances change in the future, the Company could realize liabilities, which could have a material adverse effect on operating results and its financial position.

Impairment of long-lived assets

Impairment of long-lived assets

The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the assets to the future net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell.

Recent accounting pronouncements

Recent accounting pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2013-2 (“ASU 2013-2”), “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Topic 220).” ASU 2013-2 requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. ASU 2013-2 became effective for fiscal years beginning after December 31, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statements.

In March 2013, the FASB issued Accounting Standards Update 2013-5 (“ASU 2013-5”), “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups within a Foreign Entity or of an Investment in a Foreign Entity (Topic 830),” ASU 2013-5 requires entities that cease to hold a controlling financial interest (as described in Subtopic 810-10) in a subsidiary or group of assets within a foreign entity when (1) the subsidiary or group of assets is a nonprofit activity or a business (other than a sale in substance of real estate or conveyance of oil and gas mineral rights) and (2) there is a cumulative translation adjustment balance associated with that foreign entity. The amendments also affect entities that lose a controlling financial interest in an investment in a foreign entity (by sale or other transfer event) and those that acquire a business in stages (sometimes also referred to as a step acquisition) by increasing an investment in a foreign entity from one accounted for under the equity method to one accounted for as a consolidated investment. ASU 2013-5 will become effective prospectively for fiscal years (and interim reporting periods within those years) beginning after December 15, 2013. The Company does not anticipate that this update will have a material impact on the Company’s consolidated financial statements.

XML

Summary of Status of Company's Stock Option Plan (Detail) (Stock Option Plan, USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Stock Option Plan
Shares
Outstanding at beginning of period	3,348,935	3,435,443
Cancelled	(8,617)	(8,313)
Exercised	(945,761)	(109,038)
Granted	50,000	30,843
Outstanding at end of period	2,444,557	3,348,935
Weighted Average Exercise Price
Outstanding at beginning of period	$ 1.23	$ 1.22
Cancelled	$ 1.10	$ 1.10
Exercised	$ 1.20	$ 1.42
Granted	$ 4.25	$ 3.27
Outstanding at end of period	$ 1.31	$ 1.23

XML

Summary of significant accounting policies

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Summary of significant accounting policies

Note 1 - Summary of significant accounting policies

Business

Hudson Technologies, Inc., incorporated under the laws of New York on January 11, 1991, is a refrigerant services company providing innovative solutions to recurring problems within the refrigeration industry. The Company's products and services are primarily used in commercial air conditioning, industrial processing and refrigeration systems, including (i) refrigerant sales, (ii) refrigerant management services consisting primarily of reclamation of refrigerants and (iii) RefrigerantSide® Services performed at a customer's site, consisting of system decontamination to remove moisture, oils and other contaminants. In addition, RefrigerantSide® Services include predictive and diagnostic services for industrial and commercial refrigeration applications, which are designed to predict potential catastrophic problems and identify inefficiencies in an operating system. The Company’s Chiller Chemistry®, Chill Smart®, Fluid Chemistry®, and Performance Optimization are predictive and diagnostic service offerings. As a component of the Company’s products and services, the Company also participates in the generation of carbon offset projects. The Company operates principally through its wholly-owned subsidiary, Hudson Technologies Company. Unless the context requires otherwise, references to the “Company”, “Hudson”, “we”, “us”, “our”, or similar pronouns refer to Hudson Technologies, Inc. and its subsidiaries.

In preparing the accompanying consolidated financial statements, and in accordance with ASC855-10 “Subsequent Events”, the Company’s management has evaluated subsequent events through the date that the financial statements were filed.

The accompanying unaudited consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial statements and with the instructions of Regulation S-X. Accordingly, they do not include all the information and footnotes required by generally accepted accounting principles for complete financial statements. The financial information included in the quarterly report should be read in conjunction with the Company’s audited financial statements and related notes thereto for the year ended December 31, 2012. Operating results for the six month period ended June 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.

In the opinion of management, all estimates and adjustments considered necessary for a fair presentation have been included and all such adjustments were normal and recurring.

Consolidation

The consolidated financial statements represent all companies of which Hudson directly or indirectly has majority ownership or otherwise controls. Significant intercompany accounts and transactions have been eliminated. The Company's consolidated financial statements include the accounts of wholly-owned subsidiaries Hudson Holdings, Inc. and Hudson Technologies Company.

Fair value of financial instruments

The carrying values of financial instruments including trade accounts receivable and accounts payable approximate fair value at June 30, 2013 and December 31, 2012, because of the relatively short maturity of these instruments. The carrying value of short and long-term debt approximates fair value, based upon quoted market rates of similar debt issues, as of June 30, 2013 and December 31, 2012.

Credit risk

Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of temporary cash investments and trade accounts receivable. The Company maintains its temporary cash investments in highly-rated financial institutions and, at times, the balances exceed FDIC insurance coverage. The Company's trade accounts receivables are primarily due from companies throughout the United States. The Company reviews each customer's credit history before extending credit.

The Company establishes an allowance for doubtful accounts based on factors associated with the credit risk of specific accounts, historical trends, and other information. The carrying value of the Company’s accounts receivable is reduced by the established allowance for doubtful accounts. The allowance for doubtful accounts includes any accounts receivable balances that are determined to be uncollectible, along with a general reserve for the remaining accounts receivable balances. The Company adjusts its reserves based on factors that affect the collectability of the accounts receivable balances.

For the six month period ended June 30, 2013, two customers each accounted for 10% or more of the Company’s revenues and in the aggregate these two customers accounted for 29% of the Company’s revenues. At June 30, 2013, there were $1,800,000 in outstanding receivables from these customers. For the six month period ended June 30, 2012, three customers each accounted for 10% or more of the Company’s revenues and in the aggregate these three customers accounted for 40% of the Company’s revenues. At June 30, 2012, there were $3,300,000 in outstanding receivables from these customers.

The loss of a principal customer or a decline in the economic prospects of and/or a reduction in purchases of the Company's products or services by any such customer could have a material adverse effect on the Company's operating results and financial position.

Cash and cash equivalents

Temporary investments with original maturities of ninety days or less are included in cash and cash equivalents.

Inventories

Inventories, consisting primarily of refrigerant products available for sale, are stated at the lower of cost, on a first-in first-out basis, or market.

Property, plant, and equipment

Property, plant, and equipment are stated at cost, including internally manufactured equipment. The cost to complete equipment that is under construction is not considered to be material to the Company's financial position. Provision for depreciation is recorded (for financial reporting purposes) using the straight-line method over the useful lives of the respective assets. Leasehold improvements are amortized on a straight-line basis over the shorter of economic life or terms of the respective leases. Costs of maintenance and repairs are charged to expense when incurred.

Due to the specialized nature of the Company's business, it is possible that the Company's estimates of equipment useful life periods may change in the future.

Revenues and cost of sales

Revenues are recorded upon completion of service or product shipment and passage of title to customers in accordance with contractual terms. The Company evaluates each sale to ensure collectability. In addition, each sale is based on an arrangement with the customer and the sales price to the buyer is fixed. License fees are recognized over the period of the license based on the respective performance measurements associated with the license. Royalty revenues are recognized when earned. Cost of sales is recorded based on the cost of products shipped or services performed and related direct operating costs of the Company's facilities. To the extent that the Company charges its customers shipping fees, such amounts are included as a component of revenue and the corresponding costs are included as a component of cost of sales.

The Company's revenues are derived from refrigerant and reclamation sales and RefrigerantSide® Services, including license and royalty revenues. The revenues for each of these lines are as follows:

Six Month Period Ended June 30,	2013		2012
(in thousands, unaudited)
Refrigerant and reclamation sales	$	36,268	$	34,776
RefrigerantSide® services		2,377		2,329
Total	$	38,645	$	37,105

Income taxes

The Company utilizes the asset and liability method for recording deferred income taxes, which provides for the establishment of deferred tax asset or liability accounts based on the difference between tax and financial reporting bases of certain assets and liabilities. The tax benefit associated with the Company's net operating loss carry forwards (“NOLs”) is recognized to the extent that the Company is expected to recognize future taxable income. The Company assesses the recoverability of its deferred tax assets based on its expectation that it will recognize future taxable income and adjusts its valuation allowance accordingly. As of June 30, 2013 and December 31, 2012, the net deferred tax asset was $3,625,000 and $4,122,000, respectively.

Certain states either do not allow or limit NOLs and as such the Company will be liable for certain state taxes. To the extent that the Company utilizes its NOLs, it will not pay tax on such income but may be subject to the federal alternative minimum tax. In addition, to the extent that the Company’s net income, if any, exceeds the annual NOL limitation it will pay income taxes based on existing statutory rates. Moreover, as a result of a “change in control”, as defined by the Internal Revenue Service, the Company’s ability to utilize its existing NOLs is subject to certain annual limitations. TheCompany’s NOLs are subject to annual limitations of $1,300,000.

As a result of an Internal Revenue Service audit, the 2006 and prior federal tax years have been closed. The Company operates in many states throughout the United States and, as of June 30, 2013, the various states’ statutes of limitations remain open for tax years subsequent to 2008. The Company recognizes interest and penalties, if any, relating to income taxes as a component of the provision for income taxes.

The Company evaluates uncertain tax positions, if any, by determining if it is more likely than not to be sustained upon examination by the taxing authorities. As of June 30, 2013 and December 31, 2012, the Company had no uncertain tax positions.

Income per common and equivalent shares

If dilutive, common equivalent shares (common shares assuming exercise of options and warrants) utilizing the treasury stock method are considered in the presentation of diluted earnings per share. The reconciliation of shares used to determine net income per share is as follows (dollars in thousands, unaudited):

	Three Month Period Ended June 30,				Six Month Period Ended June 30,
	2013		2012		2013		2012
Net Income	$	334	$	5,135	$	4,803	$	7,644
Weighted average number of shares – basic		24,891,115		23,841,996		24,605,541		23,813,776
Weighted average number of shares underlying warrants		383,123		277,867		432,705		277,867
Weighted average number of shares underlying options		1,584,771		2,058,097		1,631,986		2,058,097
Weighted average number of shares outstanding – diluted		26,859,009		26,177,960		26,670,232		26,149,740

During the three and six month periods ended June 30, 2013 and 2012, certain options and warrants aggregating 50,000 and no shares, respectively, have been excluded from the calculation of diluted shares, due to the fact that their effect would be anti-dilutive.

Estimates and risks

The preparation of financial statements in conformity with generally accepted accounting principles in the United States requires management to make estimates and assumptions that affect reported amounts of certain assets and liabilities, the disclosure of contingent assets and liabilities, and the results of operations during the reporting period. Actual results could differ from these estimates.

The Company utilizes both internal and external sources to evaluate potential current and future liabilities for various commitments and contingencies. In the event that the assumptions or conditions change in the future, the estimates could differ from the original estimates.

Several of the Company's accounting policies involve significant judgments, uncertainties and estimations. The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results may differ from these estimates under different assumptions or conditions. To the extent that actual results differ from management's judgments and estimates, there could be a material adverse effect on the Company. On a continuous basis, the Company evaluates its estimates, including, but not limited to, those estimates related to its allowance for doubtful accounts, inventory reserves, and valuation allowance for the deferred tax assets relating to its NOLs and commitments and contingencies. With respect to accounts receivable, the Company estimates the necessary allowance for doubtful accounts based on both historical and anticipated trends of payment history and the ability of the customer to fulfill its obligations. For inventory, the Company evaluates both current and anticipated sales prices of its products to determine if a write down of inventory to net realizable value is necessary. In determining the Company’s valuation allowance for its deferred tax assets, the Company assesses its ability to generate taxable income in the future.

The Company participates in an industry that is highly regulated, changes in which could affect operating results. Currently the Company purchases virgin, hydrochlorofluorocarbon (“HCFC”) and hydrofluorocarbon (“HFC”) refrigerants and reclaimable, primarily HCFC and chlorofluorocarbon (“CFC”), refrigerants from suppliers and its customers. Effective January 1, 1996, the Clean Air Act (the “Act”) prohibited the production of virgin CFC refrigerants and limited the production of virgin HCFC refrigerants. Effective January 2004, the Act further limited the production of virgin HCFC refrigerants and federal regulations were enacted which established production and consumption allowances for HCFC refrigerants and which imposed limitations on the importation of certain virgin HCFC refrigerants. Under the Act, production of certain virgin HCFC refrigerants is scheduled to be phased out during the period 2010 through 2020, and production of all virgin HCFC refrigerants is scheduled to be phased out by 2030. Additionally, effective January 1, 2010, the Act further limited the production of virgin HCFC refrigerants, and additional federal regulations have been enacted which imposed further limitation and a phase down on the use, production and importation of virgin HCFC refrigerants for the years 2010 through 2014. As a result of litigation, the federal regulations implementing the January 2010 phase down schedule were vacated, and in March 2013, the Environmental Protection Agency (“EPA”) published a final rule providing for further reduction in the production of HCFC refrigerants when compared to the reductions established in the January 1, 2010 published rule. The final rule allows for the production or importation of 63 million and 51 million pounds of HCFC-22 in 2013 and 2014, respectively. The EPA has not yet issued a proposed or final rule establishing the total pounds of HCFC-22 that can be produced or imported during the years 2015 through 2019.

To the extent that the Company is unable to source sufficient quantities of refrigerants or is unable to obtain refrigerants on commercially reasonable terms or experiences a decline in demand and/or price for refrigerants sold by it, the Company could realize reductions  in revenue from refrigerant sales, which could have a material adverse effect on the Company’s operating results and financial position. 

The Company is subject to various legal proceedings. The Company assesses the merit and potential liability associated with each of these proceedings. In addition, the Company estimates potential liability, if any, related to these matters. To the extent that these estimates are not accurate, or circumstances change in the future, the Company could realize liabilities, which could have a material adverse effect on operating results and its financial position.

Impairment of long-lived assets

The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of the assets to the future net cash flows expected to be generated by the asset. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of are reported at the lower of the carrying amount or fair value less the cost to sell.

Recent accounting pronouncements

In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update 2013-2 (“ASU 2013-2”), “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income (Topic 220).” ASU 2013-2 requires an entity to provide information about the amounts reclassified out of accumulated other comprehensive income by component. In addition, an entity is required to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective line items of net income but only if the amount reclassified is required under U.S. Generally Accepted Accounting Principles (“U.S. GAAP”) to be reclassified to net income in its entirety in the same reporting period. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures required under U.S. GAAP that provide additional detail about those amounts. ASU 2013-2 became effective for fiscal years beginning after December 31, 2012. The adoption of this update did not have a material impact on the Company’s consolidated financial statements.

In March 2013, the FASB issued Accounting Standards Update 2013-5 (“ASU 2013-5”), “Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups within a Foreign Entity or of an Investment in a Foreign Entity (Topic 830),” ASU 2013-5 requires entities that cease to hold a controlling financial interest (as described in Subtopic 810-10) in a subsidiary or group of assets within a foreign entity when (1) the subsidiary or group of assets is a nonprofit activity or a business (other than a sale in substance of real estate or conveyance of oil and gas mineral rights) and (2) there is a cumulative translation adjustment balance associated with that foreign entity. The amendments also affect entities that lose a controlling financial interest in an investment in a foreign entity (by sale or other transfer event) and those that acquire a business in stages (sometimes also referred to as a step acquisition) by increasing an investment in a foreign entity from one accounted for under the equity method to one accounted for as a consolidated investment. ASU 2013-5 will become effective prospectively for fiscal years (and interim reporting periods within those years) beginning after December 15, 2013. The Company does not anticipate that this update will have a material impact on the Company’s consolidated financial statements.

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Debt

6 Months Ended

Jun. 30, 2013

Debt Disclosure [Abstract]

Debt

Note 3 - Debt

On June 22, 2012, a subsidiary of Hudson entered into a Revolving Credit, Term Loan and Security Agreement (the “PNC Facility”) with PNC Bank, National Association, as agent (“Agent” or “PNC”), and such other lenders as may thereafter become a party to the PNC Facility. Under the terms of the PNC Facility, Hudson could initially borrow up to $27,000,000 consisting of a term loan in the principal amount of $4,000,000 and revolving loans in a maximum amount up to the lesser of $23,000,000 and a borrowing base that is calculated based on the outstanding amount of Hudson’s eligible receivables and eligible inventory, as described in the PNC Facility. On February 15, 2013, the PNC Facility was amended. As a result of this amendment, Hudson may borrow up to a maximum of $40,000,000 consisting of a term loan in the principal amount of $4,000,000 and revolving loans in a maximum amount up to $36,000,000.  Amounts borrowed under the PNC Facility may be used by Hudson for working capital needs and to reimburse drawings under letters of credit. Fees and expenses relating to the creation of the PNC Facility of approximately $245,000 are being amortized over the life of the loan. At June 30, 2013, total borrowings under the PNC Facility were $28,187,000, and there was $7,179,000 available to borrow under the revolving line of credit. The effective interest rate under the PNC Facility was 2.5% at June 30, 2013. 

Interest on loans under the PNC Facility is payable in arrears on the first day of each month with respect to loans bearing interest at the domestic rate (as set forth in the PNC Facility) and at the end of each interest period with respect to loans bearing interest at the Eurodollar rate (as set forth in the PNC Facility) or, for Eurodollar rate loans with an interest period in excess of three months, at the earlier of (a) each three months from the commencement of such Eurodollar rate loan or (b) the end of the interest period. Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to domestic rate loans, the sum of (i) a rate per annum equal to the higher of (1) the base commercial lending rate of PNC, (2) the federal funds open rate plus .5% and (3) the daily LIBOR plus 1%, plus (ii) .5% and (B) with respect to Eurodollar rate loans, the sum of the Eurodollar rate plus 2.25%.

Hudson granted to PNC, for itself, and as agent for such other lenders as may thereafter become a lender under the PNC Facility, a security interest in Hudson’s receivables, intellectual property, general intangibles, inventory and certain other assets.

The PNC Facility contains certain financial and non-financial covenants relating to Hudson, including limitations on Hudson’s ability to pay dividends on common stock or preferred stock, and also includes certain events of default, including payment defaults, breaches of representations and warranties, covenant defaults, cross-defaults to other obligations, events of bankruptcy and insolvency, certain ERISA events, judgments in excess of specified amounts, impairments to guarantees and a change of control. As of June 30, 2013, the Company was in compliance with all covenants in the PNC Facility.

The commitments under the PNC Facility will expire and the full outstanding principal amount of the loans, together with accrued and unpaid interest, are due and payable in full on June 22, 2015, unless the commitments are terminated and the outstanding principal amount of the loans are accelerated sooner following an event of default.

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Summary of significant accounting policies (Tables)

6 Months Ended

Jun. 30, 2013

Accounting Policies [Abstract]

Company's revenues

The revenues for each of these lines are as follows:

Six Month Period Ended June 30,	2013		2012
(in thousands, unaudited)
Refrigerant and reclamation sales	$	36,268	$	34,776
RefrigerantSide® services		2,377		2,329
Total	$	38,645	$	37,105

Reconciliation of shares used to determine net income per share

The reconciliation of shares used to determine net income per share is as follows (dollars in thousands, unaudited):

	Three Month Period Ended June 30,				Six Month Period Ended June 30,
	2013		2012		2013		2012
Net Income	$	334	$	5,135	$	4,803	$	7,644
Weighted average number of shares – basic		24,891,115		23,841,996		24,605,541		23,813,776
Weighted average number of shares underlying warrants		383,123		277,867		432,705		277,867
Weighted average number of shares underlying options		1,584,771		2,058,097		1,631,986		2,058,097
Weighted average number of shares outstanding – diluted		26,859,009		26,177,960		26,670,232		26,149,740

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Investment In Affiliates

6 Months Ended

Jun. 30, 2013

Investment In Joint Ventures [Abstract]

Investment In Affiliates

Note 4 - Investment In Affiliates

In July 2011, the Company entered into a joint venture agreement with Safety Hi-Tech S.r.l (“SHT”) and with the principals of Banini-Binotti Associates (“BB”). The joint venture has created a new entity known as Hudson Technologies Europe, S.r.l. (“HTE”). The Company and SHT each own 40% of HTE with BB owning the remaining 20%. HTE’s purpose is to develop a business that provides for refrigerant reclamation, RefrigerantSide® services and energy optimization services throughout most of Europe, the Middle East and North Africa. As of June 30, 2013, the joint venture has begun limited operations. The Company intends to, over time, have each of its offerings that are available in the US made available in each of these geographies through the operations of HTE. As of June 30, 2013, the Company has made an initial investment of $515,000, of which $408,000 represents equipment purchased in prior years, and once the results of operations are deemed material, the Company’s share of the joint venture will be recorded under the equity method.

In August 2012, the Company entered into a joint venture agreement with SHT. The joint venture has created a new entity known as Safety Hi-Tech USA, LLC (“USA”). The Company and SHT each own 50% of USA. USA’s purpose is to develop a business that provides fire suppression and suppressants throughout North America and Mexico. As of June 30, 2013, the Company has made an investment of $650,000. As of June 30, 2013, the joint venture has not started operations.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Trade accounts receivable - net of allowance for doubtful accounts	$ 250	$ 227
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, issued	25,070,386	24,124,625
Common stock, outstanding	25,070,386	24,124,625
Preferred Stock
Preferred stock, shares authorized	5,000,000	5,000,000
Series A Convertible Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, liquidation preference value	$ 100	$ 100
Preferred stock, shares authorized	150,000	150,000
Preferred stock, issued	0	0
Preferred stock, outstanding	0	0

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Company's Revenues (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Refrigerant and reclamation sales			$ 36,268	$ 34,776
RefrigerantSide services			2,377	2,329
Total	$ 15,768	$ 22,251	$ 38,645	$ 37,105

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Consolidated Statements of Cash Flows Decrease in Cash and Cash Equivalents (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 4,803	$ 7,644
Adjustments to reconcile net income to cash used by operating activities:
Depreciation and amortization	388	264
Allowance for doubtful accounts	23	1
Value of share-based payment arrangements	33	0
Amortization of deferred finance costs	41	0
Deferred tax benefit utilization	497	3,086
Changes in assets and liabilities:
Trade accounts receivable	(9,933)	(5,734)
Inventories	(11,131)	(15,403)
Prepaid and other assets	(2,305)	(3,307)
Accounts payable and accrued expenses	2,517	9,211
Income taxes payable	1,237	701
Cash used by operating activities	(13,830)	(3,537)
Cash flows from investing activities:
Additions to patents	0	(20)
Additions to property, plant, and equipment	(513)	(533)
Investment in affiliates	(27)	(3)
Cash used by investing activities	(540)	(556)
Cash flows from financing activities:
Proceeds from issuance of common stock	1,110	116
Proceeds from short-term debt - net	11,736	1,711
Proceeds from issuance of long-term debt	0	4,387
Repayment of long-term debt	(93)	(2,071)
Cash provided by financing activities	12,753	4,143
(Decrease) Increase in cash and cash equivalents	(1,617)	50
Cash and cash equivalents at beginning of period	3,991	3,958
Cash and cash equivalents at end of period	2,374	4,008
Supplemental Disclosure of Cash Flow Information:
Cash paid during period for interest	399	358
Cash paid for income taxes	$ 1,085	$ 899

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 2,374	$ 3,991
Trade accounts receivable - net of allowance for doubtful accounts of $250 and $227	11,866	1,956
Inventories	51,298	40,167
Prepaid expenses and other current assets	2,991	676
Deferred tax asset	234	234
Total current assets	68,763	47,024
Property, plant and equipment, less accumulated depreciation and amortization	4,903	4,765
Other assets	291	341
Deferred tax asset	3,391	3,888
Investments in affiliates	1,165	1,138
Intangible assets, less accumulated amortization	62	76
Total Assets	78,575	57,232
Current liabilities:
Accounts payable and accrued expenses	9,117	6,219
Accrued payroll	280	661
Income taxes payable	1,237	0
Short-term debt and current maturities of long-term debt	24,475	12,736
Total current liabilities	35,109	19,616
Long-term debt, less current maturities	4,824	4,920
Total Liabilities	39,933	24,536
Commitments and contingencies
Stockholders' equity:
Common stock, $0.01 par value; shares authorized 50,000,000; 25,070,386 and 24,124,625 issued and outstanding	251	241
Additional paid-in capital	44,856	43,722
Accumulated deficit	(6,465)	(11,267)
Total Stockholders' Equity	38,642	32,696
Total Liabilities and Stockholders' Equity	78,575	57,232
Series A Convertible Preferred Stock
Stockholders' equity:
Preferred stock shares authorized 5,000,000; Series A convertible preferred stock, $0.01 par value ($100 liquidation preference value); shares authorized 150,000; none issued or outstanding	$ 0	$ 0

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Summary of significant accounting policies - Additional Information (Detail)	6 Months Ended					6 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2012	Dec. 31, 2012 USD ($)	Jun. 30, 2013 Customer USD ($)	Jun. 30, 2012 Customer USD ($)	Jun. 30, 2014 Subsequent Event GBP (£)	Jun. 30, 2013 Subsequent Event GBP (£)
Significant Accounting Policies [Line Items]
Entity Incorporation Date Of Incorporation	Jan. 11, 1991
Number of customer accounted for approximately 10% or more of total revenues	2	3
Aggregate percentage of revenue the from customers accounted for more then 10%	29.00%	40.00%
Deferred tax asset	$ 3,391,000		$ 3,888,000
Operating loss carryforwards, limitations on use	Companys NOLs are subject to annual limitations of $1,300,000
Options and warrants excluded from the calculation of diluted shares	50,000	0
Production and importation permission from government agency, amount						51,000,000	63,000,000
Accounts receivable, net				$ 1,800,000	$ 3,300,000

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Share-based compensation - Additional Information (Detail) (USD $)	6 Months Ended			6 Months Ended			12 Months Ended	1 Months Ended		6 Months Ended	1 Months Ended		6 Months Ended	1 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Maximum	Jun. 30, 2013 Minimum	Jun. 30, 2013 Stock Option Plan	Dec. 31, 2012 Stock Option Plan	Sep. 10, 2004 Stock Incentive Plan 2004	Sep. 10, 2004 Stock Incentive Plan 2004 Maximum	Jun. 30, 2013 Stock Incentive Plan 2004 Maximum	Aug. 27, 2008 2008 Stock Incentive Plan	Aug. 27, 2008 2008 Stock Incentive Plan Maximum	Jun. 30, 2013 2008 Stock Incentive Plan Maximum	Sep. 10, 2004 2004 Stock Incentive Plan	Aug. 19, 1999 1997 Employee Stock Option Plan	Oct. 31, 1994 1994 Employee Stock Option Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share based compensation expense	$ 33,000	$ 0
Issuance of stock option to purchase stock	5,500,000
Common stock reserved for issuance	2,595,087										3,000,000			2,500,000	2,000,000	725,000
Share-based compensation arrangement by sharebased payment award options graned contractual term				10 years	5 years
Stock option awards vesting period				2 years
Options granted						50,000	30,843
Unrecognized compensation cost related to bon-vested	98,000
Plan expiration date											Aug. 27, 2008			Sep. 10, 2004	Jun. 11, 2007	Nov. 01, 2004
Options grant, expiration period, years, maximum								5 years	10 years		5 years	10 years
Intrinsic value of options exercised			$ 267,000
Share based compensation arrangement by share based payment award percentage of fair market Person holding more then 10% voting stock										110.00%			110.00%

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Share-based compensation (Tables)

6 Months Ended

Jun. 30, 2013

Share-Based Compensation [Abstract]

Weighted-average assumptions used in determining fair value of share based awards

The Company determines the fair value of share based awards at the grant date by using the Black-Scholes option-pricing model, and is incorporating the simplified method to compute expected lives of share based awards with the following weighted-average assumptions:

Six Month Period Ended June 30,	2013			2012
Assumptions
Dividend Yield		0	%		0	%
Risk free interest rate		.85	%		0	%
Expected volatility		76	%		0	%
Expected lives		5 years			none

Summary of status of company's stock option plan

A summary of the activity for the Company's Plans for the indicated periods is presented below:

Stock Option Plan Totals	Shares		Weighted Average Exercise Price
Outstanding at December 31, 2011		3,435,443	$	1.22
• Cancelled		(8,313)	$	1.10
• Exercised		(109,038)	$	1.42
• Granted		30,843	$	3.27
Outstanding at December 31, 2012		3,348,935	$	1.23
• Cancelled		(8,617)	$	1.10
• Exercised		(945,761)	$	1.20
• Granted		50,000	$	4.25
Outstanding at June 30, 2013		2,444,557	$	1.31

Weighted average contractual life and exercise price

The following is the weighted average contractual life in years and the weighted average exercise price at June 30, 2013 of:

			Weighted Average
	Number of		Remaining	Weighted Average
	Options		Contractual Life	Exercise Price
Options outstanding		2,444,557	4.6 years	$	1.31
Options vested		2,407,057	4.6 years	$	1.27

Intrinsic value

The following is the intrinsic value at June 30, 2013 of:

Options outstanding	$	4,673,382
Options vested in 2013	$	53,125
Options exercised in 2013	$	2,816,000

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Share-based compensation

6 Months Ended

Jun. 30, 2013

Share-Based Compensation [Abstract]

Share-based compensation

Note 2 - Share-based compensation

Share-based compensation represents the cost related to share-based awards, typically stock options, granted to employees, non-employees, officers and directors. Share-based compensation is measured at grant date, based on the estimated aggregate fair value of the award on the grant date, and such amount is charged to compensation expense on a straight-line basis (net of estimated forfeitures) over the requisite service period. For the six month period ended June 30, 2013 and 2012, the share-based compensation expense of $33,000 and none, respectively, is reflected in general and administrative expenses in the consolidated income statements.

Share-based awards have historically been stock options issued pursuant to the terms of the Company’s 1994 and 1997 stock option plans and the Company’s 2004 and 2008 stock incentive plans, (collectively, the “Plans”), described below. The Plans may be administered by the Board of Directors or the Compensation Committee of the Board or by another committee appointed by the Board from among its members as provided in the Plans. Presently, the Plans are administered by the Company’s Compensation Committee of the Board of Directors. As of June 30, 2013, the Plans authorized the issuance of stock options to purchase 5,500,000 shares of the Company’s common stock and, as of June 30, 2013 there were 2,595,087 shares of the Company’s common stock available for issuance for future stock option grants or other stock based awards.

Stock option awards, which allow the recipient to purchase shares of the Company’s common stock at a fixed price, are typically granted at an exercise price equal to the Company’s stock price at the date of grant. Typically, the Company’s stock option awards have generally vested from immediately to two years from the grant date and have had a contractual term ranging from five to ten years.

For the six month period ended June 30, 2013 and 2012, the Company issued 50,000 and no options, respectively. As of June 30, 2013, there was $98,000 of unrecognized compensation cost related to non-vested previously granted option awards.

Effective October 31, 1994, the Company adopted an Employee Stock Option Plan (“1994 Plan”) pursuant to which 725,000 shares of common stock were reserved for issuance upon the exercise of options designated as either (i) options intended to constitute incentive stock options (“ISOs”) under the Internal Revenue Code of 1986, as amended (“Code”), or (ii) nonqualified options. ISOs could be granted under the 1994 Plan to employees and officers of the Company. Non-qualified options could be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Effective November 1, 2004, the Company’s ability to grant options under the 1994 Plan expired.

Effective July 25, 1997, the Company adopted its 1997 Employee Stock Option Plan, which was amended on August 19, 1999, (“1997 Plan”) pursuant to which 2,000,000 shares of common stock were reserved for issuance upon the exercise of options designated as either (i) ISOs under the Code, or (ii) nonqualified options. ISOs could be granted under the 1997 Plan to employees and officers of the Company. Non-qualified options could be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Stock appreciation rights could also be issued in tandem with stock options. Effective June 11, 2007, the Company’s ability to grant options or stock appreciation rights under the 1997 Plan expired.

Effective September 10, 2004, the Company adopted its 2004 Stock Incentive Plan (“2004 Plan”) pursuant to which 2,500,000 shares of common stock were reserved for issuance upon the exercise of options, designated as either (i) ISOs under the Code, or (ii) nonqualified options, restricted stock, deferred stock or other stock-based awards. ISOs may be granted under the 2004 Plan to employees and officers of the Company. Non qualified options, restricted stock, deferred stock or other stock-based awards may be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Stock appreciation rights may also be issued in tandem with stock options. Unless the 2004 Plan is sooner terminated, the ability to grant options or other awards under the 2004 Plan will expire on September 10, 2014.

ISOs granted under the 2004 Plan may not be granted at a price less than the fair market value of the common stock on the date of grant (or 110% of fair market value in the case of persons holding 10% or more of the voting stock of the Company). Nonqualified options granted under the 2004 Plan may not be granted at a price less than the fair market value of the common stock. Options granted under the 2004 Plan expire not more than ten years from the date of grant (five years in the case of ISOs granted to persons holding 10% or more of the voting stock of the Company).

Effective August 27, 2008, the Company adopted its 2008 Stock Incentive Plan (“2008 Plan”) pursuant to which 3,000,000 shares of common stock were reserved for issuance upon the exercise of options, designated as either (i) ISOs under the Code, or (ii) nonqualified options, restricted stock, deferred stock or other stock-based awards. ISOs may be granted under the 2008 Plan to employees and officers of the Company. Non qualified options, restricted stock, deferred stock or other stock-based awards may be granted to consultants, directors (whether or not they are employees), employees or officers of the Company. Stock appreciation rights may also be issued in tandem with stock options. Unless the 2008 Plan is sooner terminated, the ability to grant options or other awards under the 2008 Plan will expire on August 27, 2018.

ISOs granted under the 2008 Plan may not be granted at a price less than the fair market value of the common stock on the date of grant (or 110% of fair market value in the case of persons holding 10% or more of the voting stock of the Company). Nonqualified options granted under the 2008 Plan may not be granted at a price less than the fair market value of the common stock. Options granted under the 2008 Plan expire not more than ten years from the date of grant (five years in the case of ISOs granted to persons holding 10% or more of the voting stock of the Company).

All stock options have been granted to employees and non-employees at exercise prices equal to or in excess of the market value on the date of the grant.

The Company determines the fair value of share based awards at the grant date by using the Black-Scholes option-pricing model, and is incorporating the simplified method to compute expected lives of share based awards with the following weighted-average assumptions:

Six Month Period Ended June 30,	2013			2012
Assumptions
Dividend Yield		0	%		0	%
Risk free interest rate		.85	%		0	%
Expected volatility		76	%		0	%
Expected lives		5 years			none

A summary of the activity for the Company's Plans for the indicated periods is presented below:

Stock Option Plan Totals	Shares		Weighted Average Exercise Price
Outstanding at December 31, 2011		3,435,443	$	1.22
• Cancelled		(8,313)	$	1.10
• Exercised		(109,038)	$	1.42
• Granted		30,843	$	3.27
Outstanding at December 31, 2012		3,348,935	$	1.23
• Cancelled		(8,617)	$	1.10
• Exercised		(945,761)	$	1.20
• Granted		50,000	$	4.25
Outstanding at June 30, 2013		2,444,557	$	1.31

The following is the weighted average contractual life in years and the weighted average exercise price at June 30, 2013 of:

			Weighted Average
	Number of		Remaining	Weighted Average
	Options		Contractual Life	Exercise Price
Options outstanding		2,444,557	4.6 years	$	1.31
Options vested		2,407,057	4.6 years	$	1.27

The following is the intrinsic value at June 30, 2013 of:

Options outstanding	$	4,673,382
Options vested in 2013	$	53,125
Options exercised in 2013	$	2,816,000

The intrinsic value of options exercised during the year ended December 31, 2012 was $267,000.

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Weighted Average Contractual Life and Exercise Price (Detail) (Stock Option Plan, USD $)	6 Months Ended
	Jun. 30, 2013
Stock Option Plan
Number of Options
Options outstanding	2,444,557
Options vested	2,407,057
Weighted Average Remaining Contractual Life
Options outstanding	4 years 7 months 6 days
Options vested	4 years 7 months 6 days
Weighted Average Exercise Price
Options outstanding	$ 1.31
Options vested	$ 1.27

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Reconciliation of Shares Used to Determine Net Income per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share Disclosure [Line Items]
Net Income	$ 334	$ 5,135	$ 4,803	$ 7,644
Weighted average number of shares - basic	24,891,115	23,841,996	24,605,541	23,813,776
Weighted average number of shares outstanding - diluted	26,859,009	26,177,960	26,670,232	26,149,740
Warrants
Earnings Per Share Disclosure [Line Items]
Weighted average number of shares underlying	383,123	277,867	432,705	277,867
Options
Earnings Per Share Disclosure [Line Items]
Weighted average number of shares underlying	1,584,771	2,058,097	1,631,986	2,058,097

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Investment In Affiliates - Additional Information (Detail) (USD $)	Jun. 30, 2013
Safety Hi-Tech S.r.l
Investment [Line Items]
Percentage of ownership in Joint Venture	40.00%
Equity method investments	$ 515,000
Safety Hi-Tech S.r.l | Equipment
Investment [Line Items]
Equity method investments	408,000
Banini-Binotti Associates
Investment [Line Items]
Percentage of ownership in Joint Venture	20.00%
Safety Hi-Tech USA LLC
Investment [Line Items]
Percentage of ownership in Joint Venture	50.00%
Equity method investments	$ 650,000

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Intrinsic Value (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Schedule of Share based Compensation Arrangements by Share based Payment Award, Performance Options [Line Items]
Options outstanding	$ 4,673,382
Options vested in 2013	53,125
Options exercised in 2013	$ 2,816,000

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Document And Entity Information	6 Months Ended
	Jun. 30, 2013	Aug. 02, 2013
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Trading Symbol	HDSN
Entity Common Stock, Shares Outstanding		25,070,386
Entity Registrant Name	HUDSON TECHNOLOGIES INC /NY
Entity Central Index Key	0000925528
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company

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Debt - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013	Feb. 15, 2013	Jun. 22, 2012
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility		$ 40,000,000	$ 27,000,000
Fees and expenses relating to creation of PNC facility			245,000
Borrowings outstanding under PNC facility	28,187,000
Available borrowing under PNC facility	7,179,000
PNC Facility effective rate of interest	2.50%
Interest rate description under PNC facility	Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to domestic rate loans, the sum of (i) a rate per annum equal to the higher of (1) the base commercial lending rate of PNC, (2) the federal funds open rate plus .5% and (3) the daily LIBOR plus 1%, plus (ii) .5% and (B) with respect to Eurodollar rate loans, the sum of the Eurodollar rate plus 2.25%.
Domestic Rate Loans
Debt Disclosure [Line Items]
PNC facility spread rate for calculation of interest	0.50%
Domestic Rate Loans | Federal Funds Base Rate
Debt Disclosure [Line Items]
PNC facility spread rate for calculation of interest	0.50%
Domestic Rate Loans | Libor Rate
Debt Disclosure [Line Items]
PNC facility spread rate for calculation of interest	1.00%
Eurodollar Rates
Debt Disclosure [Line Items]
PNC facility spread rate for calculation of interest	2.25%
Term Loan
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility		4,000,000	4,000,000
Revolving Credit Facility
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility		$ 36,000,000	$ 23,000,000