Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Net operating losses	$ 192	$ 235
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	270	623
Accrued expenses	1,374	3,174
Tax credits	0	0
Other	6	0
Total deferred tax assets	1,842	4,032
Valuation allowance	(192)	(235)
Deferred tax assets, net	1,650	3,797
Deferred tax liabilities:
Foreign earnings	(4)	(3,650)
Other	(267)	(415)
Total deferred tax liabilities	(271)	(4,065)
Deferred Tax Assets, Net	$ 1,379
Total deferred tax liabilities		$ (268)