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Summary of Business Sales Segmentation as per Product (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Sales:
Total crop									$ 258,090	$ 267,710	$ 346,514
Non-crop									31,292	30,924	34,507
Net sales	$ 83,808	$ 72,486	$ 66,523	$ 66,565	$ 77,591	$ 71,635	$ 68,313	$ 81,095	289,382	298,634	381,021
Gross profit	$ 30,698	$ 31,433	$ 25,121	$ 24,650	$ 31,238	$ 28,293	$ 26,060	$ 28,905	111,902	114,496	171,347
Crop
Net Sales:
Gross profit									97,198	101,633	155,275
Non-crop
Net Sales:
Gross profit									14,704	12,863	16,072
Insecticides
Net Sales:
Total crop									117,180	135,705	193,623
Herbicides/Soil Fumigants/Fungicides
Net Sales:
Total crop									111,897	101,785	121,042
Other, Including Plant Growth Regulators
Net Sales:
Total crop									$ 29,013	$ 30,220	$ 31,849

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Sales of non crop products.

+ References

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(a))
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

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