Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred Tax Assets:
Intangibles	$ 1,143	$ 1,268
Accrued expenses	738	1,168
Other	218	0
Net operating losses—U.S.	23,410	16,618
Net operating losses—foreign	5,181	512
Foreign tax credit	692	692
Deferred Tax Liabilities:
Intangibles	0	(370)
Fixed assets	(3,318)	(3,810)
Prepaid expenses	(47)	(50)
Valuation allowance	(28,389)	(16,772)
Net deferred tax asset (liability)	$ (372)	$ (744)