Income Taxes - Component Of Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Effective income tax rate reconciliation, percent
U.S. federal statutory rate	34.00%	34.00%
Effective income tax rate reconciliation, amount
Expected tax benefit	$ (2,999)	$ (3,052)
Net tax effects of:
Foreign tax rate differential	167	(214)
State taxes, net of federal benefits	(602)	(381)
Return to provision adjustment	(619)	(579)
Research and other credits	(59)	(92)
Permanent difference on Convertible Notes and warrants	(589)	277
Expiring net operating loss carryforwards		2,441
Other	52	175
Change in deferred tax asset valuation allowance	4,250	1,563
Income tax expense (benefit) from continuing operations	$ (399)	$ 138