Income Taxes (Detail Textuals) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 312	$ 165
Income tax U.S. statutory rate	34.00%	34.00%
Tax benefits from stock-based awards	$ 400
Deferred tax assets	900
Equity adjustment to additional paid-in capital	$ 400
Federal | Research and development credit carryforwards
Operating Loss Carryforwards [Line Items]
Net federal and state research and development credit carryforwards			$ 5,500
State | Research and development credit carryforwards
Operating Loss Carryforwards [Line Items]
Net federal and state research and development credit carryforwards			$ 100