Investment in Unconsolidated Entity - Summary of Condensed Financial Information Related to Unconsolidated Entity (Detail) - Limagrain Cereal Seeds LLC [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Assets:
Current assets	$ 2,963	$ 2,104
Non-current assets	9,776	9,864
Total assets	12,739	11,968
Liabilities and equity:
Current liabilities	26,992	20,807
Total liabilities and equity	12,739	11,968
Revenue	3,635	3,630
Gross profit	1,594	1,328
Loss from continuing operations	(5,268)	(5,509)
Net loss	(5,413)	(5,741)
Arcadia Biosciences, Inc [Member]
Liabilities and equity:
Equity	(4,989)	(3,002)
Vilmorin USA [Member]
Liabilities and equity:
Equity	$ (9,264)	$ (5,837)