Income Taxes - Difference between Income Taxes Computed at Federal Statutory Rate and Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Expected income tax provision (benefit) at statutory rate	$ (23,416)	$ (14,859)
State tax, tax effected	52	11
Other	339	(40)
Net operating loss write down	49,608
Rate difference	311	(233)
Permanent differences	511
Total income tax expense (benefit) from continuing operations	$ 27,405	$ (15,121)