Income Taxes (Details Narrative) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2013	Dec. 31, 2014
Decrease in valuation allowance	$ 600	$ (37,527)
Maximum state net operating loss carryforwards not recognized	800
Nonreversable valuation allowance, stock options	4,600
Future transfer from income tax benefit to stockholders' equity	(4,600)
Unrecognized tax benefits	500	$ 636
Accrued interest	10		$ 28
Acquisition-related Limitation [Member]
NOL subject to limit	9,900
Valuation allowance, subsidiaries	4,100
Federal [Member]
Deferred tax assets attributable to stock option deductions	13,500
NOL subject to limit	88,200
NOL carry-forwards incurred by subsidiaries	10,800
Tax-effected federal and state NOLs pertaining to tax deductions from stock-based compensation	1,400
Research and development tax credit carry-forwards	300
State [Member]
NOL subject to limit	51,400
NOL carry-forwards incurred by subsidiaries	5,000
Tax-effected federal and state NOLs pertaining to tax deductions from stock-based compensation	300
Research and development tax credit carry-forwards	200
Maximum [Member] | Acquisition-related Limitation [Member]
NOL Limitation	$ 500