Income Taxes (Income Tax Benefit Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Line Items]
Total	$ (24,003)	$ (12,124)
Tax rate	35.00%	35.00%
Computed "expected" tax benefit	$ (8,401)	$ (4,243)
State taxes, net of federal income tax benefit	0	(294)
Change in valuation allowance	8,107	3,627
Nondeductible expenses	276	64
Other items	18	(20)
Income tax benefit	$ 0	$ (866)