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Stock Option Plans - RSUs (Details) - Restricted stock units
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Number of Restricted Stock Units  
Beginning balance (in shares) | shares 0
Restricted stock granted (in shares) | shares 38,225
Restricted stock vested (in shares) | shares 0
Restricted stock forfeited (in shares) | shares 0
Ending balance (in shares) | shares 38,225
Weighted Average Grant Date Fair Value  
Beginning balance (in USD per share) | $ / shares $ 0
Restricted stock granted (in USD per share) | $ / shares 30.93
Restricted stock vested (in USD per share) | $ / shares 0
Restricted stock forfeited (in USD per share) | $ / shares 0
Ending balance (in USD per share) | $ / shares $ 30.93