Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued liabilities
Accrued bonuses and commissions	$ 1,590	$ 604
Accrued salaries, wages, and related costs	1,308	977
Accrued vacation	906	894
Miscellaneous taxes	576	632
Accrued legal fees	550	18
Other	1,526	781
Total accrued liabilities	$ 6,456	$ 3,906