(Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intangible assets
Net amount	$ 709	$ 976
Amortization expense for intangible assets	200	100	$ 100
Estimated Amortization Expense
2018	186
2019	186
2020	186
2021	134
2022	17
Total	709
Product formulations
Intangible assets
Gross carrying amount	1,800	1,900
Accumulated amortization	1,100	900
Net amount	$ 700	1,000
Product formulations | Minimum
Intangible assets
Estimated useful lives	9 years
Product formulations | Maximum
Intangible assets
Estimated useful lives	15 years
Blue Hat Product Registrations
Intangible assets
Gross carrying amount		$ 500
Impairment of Intangible Assets, Finite-lived	$ 100
Blue Hat Product Registrations | Minimum
Intangible assets
Estimated useful lives		3 years
Blue Hat Product Registrations | Maximum
Intangible assets
Estimated useful lives		5 years