Stock-Based Compensation and Employee Benefit Plan - Number of Shares Available for Grant (Details)	6 Months Ended
	Jun. 30, 2020 shares
Options/ RSUs Available for Grant
Beginning balance (in shares)	17,233,144
Added to plan (in shares)	6,654,552
Granted (in shares)	(1,414,942)
Cancelled (in shares)	992,262
Expired (in shares)	675,276
Ending Balance (in shares)	22,789,740