Goodwill and Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Amount	$ 4,703	$ 4,350
Accumulated Amortization	(3,292)	(3,170)
Net Amount	1,411	1,180
Product Formulation [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	138	138
Accumulated Amortization	(109)	(104)
Net Amount	29	34
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	750	750
Accumulated Amortization	(444)	(419)
Net Amount	306	331
Approvals and Certifications [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	3,815	3,462
Accumulated Amortization	(2,739)	(2,647)
Net Amount	$ 1,076	$ 815