Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan (Details Textual)

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Equity Incentive Plan (Details Textual)
3 Months Ended
Mar. 31, 2016
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $ $ 3,771,755
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 9 months 18 days
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 3,014,810
Employee Stock Option [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock Granted, Value, Share-based Compensation, Gross | $ $ 207,482
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 59,938
Allocated Share-based Compensation Expense | $ $ 39,235
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 4,607
Performance Share Units [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 119,000
Share Based Compensation Arrangement By Share Based Payment Award Grant Date Fair Value 429,293
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares $ 3.61
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 55.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.50%
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost, Total | $ $ 26,831
Performance Share Units [Member] | Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share Price | $ / shares $ 16
Performance Share Units [Member] | Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share Price | $ / shares $ 10
Employees [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 22,000
Director [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 37,938
Equity Incentive 2013 Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 654,927
Equity Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Proceeds from Issuance of Common Stock | $ $ 23,035