Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Schedule of Share-based Compensation, Restricted Stock Units Award Activity (Details)

v3.19.1
Stock-based Compensation - Schedule of Share-based Compensation, Restricted Stock Units Award Activity (Details) - Restricted Shares [Member] - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Shares available for grant, beginning 1,211,234  
Shares available for grant, ending   1,211,234
Common Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Shares available for grant, beginning 1,211,234 237,403
Additional shares available for grant 1,500,000
RSUs granted (707,200) (555,500)
RSUs forfeited 43,756 29,331
Shares available for grant, ending 547,790 1,211,234
Preferred Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Shares available for grant, beginning 27,200 67,000
Additional shares available for grant 200,000
RSUs granted (44,800) (39,800)
RSUs forfeited
Shares available for grant, ending 182,400 27,200