v3.8.0.1
SHARE-BASED COMPENSATION - RSU Activity - Summary of Change (Details)
3 Months Ended
Mar. 31, 2018
USD ($)
$ / shares
shares
Number of Restricted Stock Units [Roll Forward]  
RSUs beginning 4,285,290
RSUs awarded 28,700
RSUs assumed in Merger 0
RSUs released (946,187)
RSUs forfeited (186,485)
RSUs ending 3,181,318
Weighted Average Purchase Price RSUs | $ / shares $ 0
Weighted Average Remaining Contractual Term (Years) RSUs 1 year 4 months 24 days
Aggregate Intrinsic Value RSUs | $ $ 30,223,813
Number of RSUs vested and expected to vest 3,181,318
Weighted Average Purchase Price of RSUs vested and expected to vest | $ / shares $ 0
Weighted Average Remaining Contractual Term (Years) of RUSs vested and expected to vest 1 year 3 months 18 days
Aggregate Intrinsic Value RSUs vested and expected to vest | $ $ 30,223,813
Number of RSUs exercisable 48,880
Weighted Average Purchase Price of RUSs exercisable | $ / shares $ 0
Weighted Average Remaining Contractual Term (Years) of RUSs exercisable 0 years
Aggregate Intrinsic Value RSUs exercisable | $ $ 464,360
Weighted average remaining recognition period in years 2 years
Unamortized compensation expense, net of estimated forfeitures | $ $ 28,135,832