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Stock Options (Details 2) - Restricted Stock [Member]
12 Months Ended
Dec. 31, 2016
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Non-vested at the beginning of the period (in shares) | shares 729,000
Granted | shares 0
Vested | shares (364,500)
Forfeited / Expired | shares (14,800)
Non-vested at the end of the period (in shares) | shares 349,700
Non-vested at the beginning of the period (in dollars per share) | $ / shares $ 4.98
Granted (in dollars per share) | $ / shares 0
Vested (in dollars per share) | $ / shares 4.98
Forfeited / Expired (in dollars per share) | $ / shares 4.98
Non-vested at the end of the period (in dollars per share) | $ / shares $ 4.98