Other Income (Expense), Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Other Income (Expense), Net
Gain (loss) on change in fair value of liability-classified warrants	$ 2,617	$ (506)
Offering costs	(833)	(293)
Income (loss) from unconsolidated affiliates	37	46
Foreign currency exchange gain	838	549
Other	5	30
Other income (expense), net	$ 2,664	$ (174)