Summary of Significant Accounting Policies (Schedule of Differences between Total Income Tax or Benefit and Amount Computed by Applying the Statutory Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of Significant Accounting Policies [Abstract]
Statutory rate of 34% applied to pre-tax income (loss)	$ (7,299)	$ (6,683)	$ (1,793)
Permanent differences, net	(2,021)	281	128
State income tax, net of federal benefit	(689)	(268)	(365)
Foreign income tax	33
Valuation allowance (decrease) increase		(3,395)	$ 2,030
Total tax expense (benefit)	$ (9,976)	$ (10,065)
Effective tax rate	46.50%	34.80%	0.00%
Statutory rate	34.00%