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Inventories - Additional Information (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Inventory [Line Items]
Inventory reserves	$ 1,389,000	$ 1,818,000	$ 1,767,000	$ 1,616,000
Climate Control Products [Member]
Inventory [Line Items]
Inventory reserves	1,389,000	1,818,000
Chemical Products [Member]
Inventory [Line Items]
Inventory reserves	$ 1,623,000	$ 975,000

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Amount of valuation reserve for inventory.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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-Section S99

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 330

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-URI http://asc.fasb.org/extlink&oid=6386567&loc=d3e3927-108312



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

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-Publisher FASB

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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