Subsequent Event - Additional Information (Detail) - USD ($)		9 Months Ended
	Oct. 10, 2017	Sep. 30, 2017	Feb. 15, 2013	Jun. 22, 2012
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 40,000,000	$ 50,000,000
Airgas Refrigerants, Inc. [Member] | Pro Forma [Member]
Subsequent Event [Line Items]
Business Combination, Acquisition Related Costs		$ 2,400,000
Subsequent Event [Member] | Term Loan [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 25,000,000
Debt Instrument, Face Amount	105,000,000
Proceeds from Bank Debt	$ 105,000,000
Debt Instrument, Payment Terms	Principal payments on the Term Loans are required on a quarterly basis, commencing with the quarter ending March 31, 2018, in the amount of 1% of the original principal amount of the outstanding Term Loans per annum. The Term Loan Facility also requires annual payments of up to 50% of Excess Cash Flow (as defined in the Term Loan Facility) depending upon the Company’s Total Leverage Ratio (as defined in the Term Loan Facility) for the applicable year. The Term Loan Facility also requires mandatory prepayments of the Term Loans in the event of certain asset dispositions, debt issuances, and casualty and condemnation events. The Term Loans may be prepaid at the option of the Borrowers at par in an amount up to $30 million. Additional prepayments are permitted after the first anniversary of the closing date subject to a prepayment premium of 3% in year two, 1% in year three and zero in year four and thereafter.
Debt Instrument, Maturity Date	Oct. 10, 2023
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 7.25%
Debt Instrument, Basis Spread on Variable Rate	7.25%
Debt Instrument, Interest Rate, Stated Percentage	3.00%
Subsequent Event [Member] | PNC Bank [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 150,000,000
Proceeds from Lines of Credit	$ 80,000,000
Debt Instrument, Interest Rate Terms	(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 0.5% and (3) the daily LIBOR plus 1.0%, plus (ii) between 0.50% and 1.00% depending on average quarterly undrawn availability and (B) with respect to Eurodollar rate loans, the sum of the Eurodollar rate plus between 1.50% and 2.00% depending on average quarterly undrawn availability.
Subsequent Event [Member] | PNC Bank [Member] | Letter of Credit [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 5,000,000
Subsequent Event [Member] | PNC Bank [Member] | Swing Line Loan [Member]
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	15,000,000
Subsequent Event [Member] | Airgas, Inc. [Member]
Subsequent Event [Line Items]
Transaction valued on gross basis	209,000,000
Payments to Acquire Businesses, Gross	$ 80,000,000