Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Restricted Stock Units Activity (Details)

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Stock-Based Compensation - Summary of Restricted Stock Units Activity (Details) (RSUs, USD $)
6 Months Ended
Jun. 30, 2014
RSUs
 
Number of Awards  
Unvested at beginning of period 168,832
Granted 1,730,714
Vested (38,798)
Forfeited (33,232)
Unvested at end of period 1,827,516
Weighted-Average Grant Date Fair Value  
Unvested at beginning of period $ 14.36
Granted $ 5.75
Vested $ 5.75
Forfeited $ 7.84
Unvested at end of period $ 6.09