Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Examination [Line Items]
Income tax expense	$ 287	$ 35	$ 173
Federal tax rate	34.00%
Deferred tax assets valuation allowance	$ 15,250	$ 14,309
Valuation allowance increase (decrease)	$ 1,000
Change in ownership percentage (more than)	50.00%
Stockholder ownership (or greater)	5.00%
Windfall tax benefits in additional paid in capital	$ 122
Accounted for Additional Paid-in Capital
Income Tax Examination [Line Items]
Net operating losses	3,300
Not Subject to Limitations
Income Tax Examination [Line Items]
Proceeds from sale of operating loss carryforward	15,300
Subject to Limitations | Minimum
Income Tax Examination [Line Items]
Net operating losses	1,000
Subject to Limitations | Maximum
Income Tax Examination [Line Items]
Net operating losses	$ 2,300