Investment in Unconsolidated Entity - Additional information (Detail) - Limagrain Cereal Seeds LLC [Member] - USD ($)	3 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Investment, ownership percentage		35.00%
Loss on investments	$ 0
Equity Method Investment, Additional Information	At December 31, 2016, the Company owned a 35% ownership position in Limagrain Cereal Seeds LLC (“LCS”). The remaining 65% of LCS is owned by Vilmorin & Cie (“Limagrain”), a major global producer and marketer of field crop and vegetable seeds and affiliate of Groupe Limagrain, through its wholly owned subsidiary, Vilmorin USA (“VUSA”). LCS improves and develops new wheat and barley varieties utilizing genetic and breeding resources, as well as advanced technologies, from Groupe Limagrain and the Company. Historically, funding for LCS has come from an initial pro rata equity investment from each partner and with subsequent financing in the form of debt from VUSA. The Company’s investment in LCS has been reduced to $0 as a result of its equity method loss recognition since 2014.
Common stock shares retired using cost method as result of transfer of membership interest	1,843,888
Vilmorin Cie [Member]
Schedule of Equity Method Investments [Line Items]
Investment, remaining ownership percentage		65.00%