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Share-Based Payments (Details 3) - Restricted Stock
12 Months Ended
Dec. 31, 2018
$ / shares
shares
Shares  
Non-vested restricted shares outstanding at January 1, 2018 | shares 109,586
Granted | shares 1,342,743
Forfeited | shares (100,000)
Vested | shares (1,264,743)
Non-vested restricted shares outstanding at December 31, 2018 | shares 87,586
Weighted-average fair value  
Non-vested restricted shares outstanding at January 1, 2018 | $ / shares $ 1.92
Granted | $ / shares 2.58
Forfeited | $ / shares 2.27
Vested | $ / shares 2.56
Non-vested restricted shares outstanding at December 31, 2018 | $ / shares $ 2.46