CONVERTIBLE PREFERRED STOCK (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Temporary Equity [Line Items]
Shares Authorized (in shares)	500,000,000	126,605,000
Shares issued (in shares)	0	112,878,000
Shares outstanding (in shares)	0	112,878,000
Liquidation Preference	$ 0	$ 578,750
Carrying Value	$ 0	$ 562,467
Series FF
Temporary Equity [Line Items]
Shares Authorized (in shares)		5,739,000
Shares issued (in shares)		5,739,000
Shares outstanding (in shares)	0	5,739,000
Original Issue Price per Share (in dollars per share)		$ 0
Liquidation Preference		$ 0
Carrying Value		$ 11
Series A
Temporary Equity [Line Items]
Shares Authorized (in shares)		30,929,000
Shares issued (in shares)		27,349,000
Shares outstanding (in shares)	0	27,349,000
Original Issue Price per Share (in dollars per share)	$ 0.19721
Liquidation Preference		$ 5,394
Carrying Value		$ 4,946
Series B
Temporary Equity [Line Items]
Shares Authorized (in shares)		25,416,000
Shares issued (in shares)		21,831,000
Shares outstanding (in shares)	0	21,831,000
Original Issue Price per Share (in dollars per share)	$ 1.00676
Liquidation Preference		$ 21,978
Carrying Value		$ 19,228
Series C
Temporary Equity [Line Items]
Shares Authorized (in shares)		32,542,000
Shares issued (in shares)		31,656,000
Shares outstanding (in shares)	0	31,656,000
Original Issue Price per Share (in dollars per share)	$ 2.76488
Liquidation Preference		$ 87,525
Carrying Value		$ 83,146
Series D
Temporary Equity [Line Items]
Shares Authorized (in shares)		17,471,000
Shares issued (in shares)		17,471,000
Shares outstanding (in shares)	0	17,471,000
Original Issue Price per Share (in dollars per share)	$ 8.2539
Liquidation Preference		$ 144,205
Carrying Value		$ 135,738
Series E
Temporary Equity [Line Items]
Shares Authorized (in shares)		14,508,000
Shares issued (in shares)		8,832,000
Shares outstanding (in shares)	0	8,832,000
Original Issue Price per Share (in dollars per share)	$ 36.1922
Liquidation Preference		$ 319,648
Carrying Value		$ 319,398