Stockholders' Equity (Deficit) - Preferred Units Outstanding (Details) $ / shares in Units, $ in Thousands	Dec. 31, 2019 USD ($) $ / shares shares
Preferred Units [Line Items]
Units Authorized (in units)	50,965,118,000
Units Issued and Outstanding (in units)	50,965,118,000
Series A Non-Redeemable Convertible Preferred Stock
Preferred Units [Line Items]
Units Authorized (in units)	9,941,227,000
Units Issued and Outstanding (in units)	9,941,227,000
Per Unit Liquidation Preference (in dollars per share) | $ / shares	$ 0.50
Aggregate Liquidation Preference | $	$ 4,971
Per Unit Initial Conversion Price (in dollars per share) | $ / shares	$ 0.25
Series B Non-Redeemable Convertible Preferred Stock
Preferred Units [Line Items]
Units Authorized (in units)	19,117,039,000
Units Issued and Outstanding (in units)	19,117,039,000
Per Unit Liquidation Preference (in dollars per share) | $ / shares	$ 0.50
Aggregate Liquidation Preference | $	$ 9,559
Per Unit Initial Conversion Price (in dollars per share) | $ / shares	$ 0.25
Series C Redeemable Convertible Preferred Stock
Preferred Units [Line Items]
Units Authorized (in units)	21,906,852,000
Units Issued and Outstanding (in units)	21,906,852,000
Per Unit Liquidation Preference (in dollars per share) | $ / shares	$ 1.83
Aggregate Liquidation Preference | $	$ 40,090
Per Unit Initial Conversion Price (in dollars per share) | $ / shares	$ 1.83