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Summary of Business Sales Segmentation as per Product (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net sales:
Total crop									$ 272,204	$ 258,090	$ 267,710
Non-crop									39,909	31,292	30,924
Net sales	$ 87,468	$ 82,447	$ 72,724	$ 69,474	$ 83,808	$ 72,486	$ 66,523	$ 66,565	312,113	289,382	298,634
Gross profit	$ 36,404	$ 32,986	$ 31,395	$ 27,503	$ 30,698	$ 31,433	$ 25,121	$ 24,650	128,288	111,902	114,496
Crop
Net sales:
Gross profit									107,821	97,198	101,633
Non-crop
Net sales:
Gross profit									20,467	14,704	12,863
Insecticides
Net sales:
Total crop									119,226	117,180	135,705
Herbicides/Soil Fumigants/Fungicides
Net sales:
Total crop									123,540	111,897	101,785
Other, Including Plant Growth Regulators
Net sales:
Total crop									$ 29,438	$ 29,013	$ 30,220

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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=63488584&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=63488584&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=63488584&loc=d3e20235-122688

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