Income Taxes - Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred tax assets:
Accrued liabilities	$ 556	$ 343
NOL carryforward	15,725	17,381
Other	27	444
Total deferred tax assets	16,308	18,168
Valuation allowance	(16,130)	(18,116)
Net deferred tax assets	178	52
Deferred tax (liabilities)
Property and equipment	(210)	(350)
Total deferred tax (liabilities)	(210)	(350)
Net deferred tax (liabilities)	$ (32)	$ (298)