Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Details Textual)

v3.10.0.1
Stock Plans (Details Textual) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Aug. 07, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted-average period for recognizing non-vested stock option     3 months 18 days    
Employee Stock Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 0.3   $ 0.3    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 50,000 50,000 950,000 546,000  
Omnibus Equity Incentive Plan 2015 [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         3,500,000
Omnibus Equity Incentive Plan 2015 [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         2,500,000