Quarterly report pursuant to Section 13 or 15(d)

Stock Options and Warrants - Restricted Stock Units (Details)

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Stock Options and Warrants - Restricted Stock Units (Details) - Restricted stock units
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 30, 2015
USD ($)
$ / shares
shares
Units:  
Outstanding, beginning balance (in shares) 59,000
Granted (in shares) 408,000
Vested (in shares) (48,000)
Forfeited (in shares) (13,000)
Nonvested, ending balance (in shares) 406,000
Vested and expected to vest, ending balance 295,000
Weighted Average Exercise Price (in dollars per share):  
Outstanding, beginning balance (in dollar per share) | $ / shares $ 12.90
Granted (in dollar per share) | $ / shares 12.88
Vested (in dollar per share) | $ / shares 12.90
Forfeited (in dollar per share) | $ / shares 12.98
Nonvested, ending balance (in dollar per share) | $ / shares 12.88
Vested and expected to vest, ending balance (in dollar per share) | $ / shares $ 12.89
Nonvested, aggregate intrinsic value at end of period | $ $ 4,658
Vested and expected to vest, aggregate intrinsic value at end of period | $ $ 3,391
Board Member  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock options vesting term 13 months
Units:  
Granted (in shares) 29,000