Inventories - Additional Information (Detail) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Climate Control Business Products [Member]
Inventory [Line Items]
Inventory reserves	$ 1,855,000	$ 1,653,000
Chemical Products [Member]
Inventory [Line Items]
Inventory reserves	$ 2,784,000	$ 1,976,000

Amount of valuation reserve for inventory.

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