Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details)

v3.19.1
Stock-Based Compensation - Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details) - Restricted Shares [Member] - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Common Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding and unvested at beginning 605,969 406,959
Granted 707,200 555,500
Vested (340,066) (327,159)
Forfeited (43,756) (29,331)
Outstanding and unvested at ending 929,347 605,969
Preferred Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding and unvested at beginning 39,800 33,000
Granted 44,800 39,800
Vested (39,800) (33,000)
Forfeited
Outstanding and unvested at ending 44,800 39,800