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Equity-Based Compensation - Summary of Option Activity (Details) - 2017 Equity Incentive Plan - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Number of Options      
Outstanding at beginning of year (in shares) 0 0 233,495
Exercised (in shares) 0 0 (233,495)
Outstanding at end of year (in shares) 0 0 0
Exercisable at end of year (in shares) 0 0 0
Weighted- Average Exercise Price      
Outstanding at beginning of year (in dollars per share) $ 0 $ 0 $ 1.34
Exercised (in dollars per share) 0 0 1.34
Outstanding at end of year (in dollars per share) 0 0 0
Exercisable at end of year (in dollars per share) $ 0 $ 0 $ 0
Intrinsic value of options exercised     $ 4,350