Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity (Details)

v3.19.1
Stockholders' Equity (Details) - Restricted Stock [Member] - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Units, Nonvested 2,611,116 2,533,063
Number of Units, Granted 616,240 359,303
Number of Units, Vested (295,250) (281,250)
Number of Units, Nonvested 2,932,106 2,611,116
Weighted Average Exercise Price, Nonvested Beginning Balance $ 3.89 $ 2.93
Weighted Average Grant Date Fair Value, Granted 3.75 7.69
Weighted Average Grant Date Fair Value, Vested 0.29 0.07
Weighted Average Exercise Price, Nonvested Ending Balance $ 4.22 $ 3.89