Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Accrued compensation	$ 1,637	$ 1,310
Professional fees	115	123
Accrued interest on debt (Note 7)	225	252
Other	347	249
Total	$ 2,324	$ 1,934