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Stock-Based Compensation Unvested Restricted Stock during the year (Tables)
 12 Months Ended
Dec. 31, 2016
Stock option activity during the year [Abstract]  
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
during the year ended December 31, 2018:
 
 
 
 
 
 
 
Number of Restricted Stock Awards
 
Weighted-Average Grant Date Fair Value (per Share)
Unvested at December 31, 2017
 
1,952,665

 
$
4.14

Granted
 
850,000

 
4.42

Vested
 
(79,538
)
 
2.95

Cancelled for Tax Withholding
 
(135,512
)
 
2.65

Forfeited
 
(1,495,165
)
 
4.14

Unvested at December 31, 2018
 
1,092,450

 
$
4.51