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Earnings before interest taxes depreciation and amortization.

+ References

No definition available.

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- Definition

Fixed charge coverage ratio

+ References

No definition available.

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- Definition

Production and importation permission from government agency during the period for the entire US market.

+ References

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

The effective interest rate at the end of the reporting period.

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- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Debt - Additional Information (Detail) (USD $)	3 Months Ended				3 Months Ended								3 Months Ended				3 Months Ended
Debt - Additional Information (Detail) (USD $)	Mar. 31, 2014 lb	Mar. 31, 2013 lb	Feb. 15, 2013	Jun. 22, 2012	Mar. 31, 2014 Set By PNC	Mar. 31, 2014 Achieved by Hudson Technologies	Mar. 31, 2020 Subsequent Event lb	Mar. 31, 2015 Subsequent Event lb	Sep. 30, 2013 Minimum	Sep. 30, 2013 Maximum	Feb. 15, 2013 Term Loan	Jun. 22, 2012 Term Loan	Mar. 31, 2014 Term Loan Base Rate	Mar. 31, 2014 Term Loan Eurodollar	Feb. 15, 2013 Revolving Credit Facility	Jun. 22, 2012 Revolving Credit Facility	Mar. 31, 2014 Revolving Credit Facility Base Rate	Mar. 31, 2014 Revolving Credit Facility Eurodollar
Debt Disclosure [Line Items]
Maximum borrowing under PNC facility			$ 40,000,000	$ 27,000,000							$ 4,000,000	$ 4,000,000			$ 36,000,000	$ 23,000,000
Fees and expenses relating to creation of PNC facility	125,000
Borrowings outstanding under PNC facility	17,958,000
Available borrowing under PNC facility	7,612,000
PNC Facility effective rate of interest	3.00%
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 2.75%.
PNC facility spread rate for calculation of interest													1.00%	2.75%			1.00%	2.75%
Fixed charge coverage ratio									1.00	1.10
Debt instrument, description of variable rate basis													Base Rate plus one percent	Eurodollar Rate plus two and three quarters of one percent			Base Rate plus one percent	Eurodollar Rate plus two and three quarters of one percent
Earnings Before Interest Taxes Depreciation And Amortization	$ 672,000				$ 494,000	$ 672,000
Production and importation permission from government agency	51,000,000	63,000,000					6,000,000	30,000,000