STOCKHOLDERS' EQUITY - Stock option activity (Details)	9 Months Ended
	Sep. 30, 2022 shares
Stock options
Equity Incentive Plans Stock Option Activity [Line Items]
Equity awards outstanding, beginning of year	2,467,537
Number of shares, Granted.	2,975,000
Number of shares, Exercised or vested	(130,607)
Number of shares, Expired or Forfeited	(158,193)
Equity awards outstanding, end of period	5,153,737
Unvested restricted stock
Equity Incentive Plans Stock Option Activity [Line Items]
Equity awards outstanding, beginning of year	12,032,040
Number of shares, Granted.	4,051,606
Number of shares, Exercised or vested	(2,581,705)
Number of shares, Expired or Forfeited	(2,075,112)
Equity awards outstanding, end of period	11,426,829