Income Taxes (Details 3) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets
Credit carryforward	$ 2,660	$ 2,660
Stock based compensation	477	582
Other	634	254
Capital loss (Impairment)	3,454	4,738
Net operating losses	140,799	142,265
Gross deferred tax assets	148,024	150,499
Valuation allowance	(109,553)	(133,666)
Net deferred tax assets	$ 38,471	$ 16,833