Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 4,557	$ 4,350
Accumulated Amortization	(3,234)	(3,170)
Net Amount	1,323	1,180
Product Formulations [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	138	138
Accumulated Amortization	(106)	(104)
Net Amount	32	34
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	750	750
Accumulated Amortization	(432)	(419)
Net Amount	318	331
Approvals and Certifications [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	3,669	3,462
Accumulated Amortization	(2,696)	(2,647)
Net Amount	$ 973	$ 815