Provision (Benefit) for Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%
Stock-based compensation tax shortfall	$ 2,409,000	$ 558,000	$ 0
Total tax impact of APIC shortfall		2,200,000
Adjustments to Additional Paid in Capital, Income Tax Deficiency from Share-based Compensation		1,600,000
Deferred Tax Assets, Operating Loss Carryforwards	405,400,000
Valuation allowance of carryover tax assets	$ 10,900,000	$ 6,600,000