Quarterly report pursuant to Section 13 or 15(d)

Common Stock, Stock Options and Warrants - Restricted Stock Units (Details)

v3.4.0.3
Common Stock, Stock Options and Warrants - Restricted Stock Units (Details) - Restricted stock units
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2016
USD ($)
$ / shares
shares
Units:  
Outstanding, beginning balance (in shares) | shares 408
Granted (in shares) | shares 269
Vested (in shares) | shares (32)
Forfeited (in shares) | shares (15)
Nonvested, ending balance (in shares) | shares 630
Vested and expected to vest, ending balance (in shares) | shares 468
Weighted Average Exercise Price (in dollars per share):  
Outstanding, beginning balance (in dollar per share) | $ / shares $ 12.71
Granted (in dollar per share) | $ / shares 9.18
Vested (in dollar per share) | $ / shares 13.14
Forfeited (in dollar per share) | $ / shares 11.98
Nonvested, ending balance (in dollar per share) | $ / shares 11.20
Vested and expected to vest, ending balance (in dollars per share) | $ / shares $ 11.27
Nonvested, aggregate intrinsic value at end of period | $ $ 5,368
Vested and expected to vest, aggregate intrinsic value at end of period | $ $ 3,990