STOCKHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Thousands				12 Months Ended
	Nov. 18, 2023	Jul. 13, 2023	Jun. 08, 2020	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jun. 16, 2023	Jun. 06, 2023	Jun. 05, 2023	Mar. 13, 2023	Mar. 12, 2023	Jun. 10, 2022	Jan. 12, 2022	Jan. 11, 2022	Sep. 22, 2021	Apr. 22, 2018
Common Stock
Common stock, shares authorized				500,000,000	300,000,000
Common stock, par or stated value per share				$ 0.000041666	$ 0.000041666
Common stock, shares issued				256,135,715	187,812,072
Common stock, shares outstanding				256,135,715	187,812,072
Common stock issued, net of offering costs (in shares)		23,000,000
Proceeds from the issuance of common stock, net				$ 463,281	$ 189,502	$ 203,156
Weighted average grant date fair value, options granted				$ 4.91	$ 8.29	$ 22.28
Common stock issued upon exercise of stock options (in shares)		3,000,000
Share price (in dollars per share)		$ 7.50
Net proceeds from public offering		$ 161,500
Intrinsic value of options exercised				$ 10	$ 40	$ 21,300
Common Stock
Common Stock
Common stock issued upon exercise of stock options (in shares)				8,860	203,579	2,822,617
At the Market Offering Program
Common Stock
Maximum percentage of commission	3.00%
Common stock issued, net of offering costs (in shares)				44,080,226	29,788,993
Weighted average price				$ 6.99	$ 6.52
Proceeds from the issuance of common stock				$ 301,700	$ 189,500
Second Sales Agreement
Common Stock
Maximum amount of shares to be issued	$ 500,000
2023 Sales Agreement
Common Stock
Maximum amount of shares to be issued							$ 450,000
Series A Convertible Preferred Stock
Common Stock
Preferred stock, shares authorized				17,000	17,000
Preferred stock, par or stated value per share				$ 0.001	$ 0.001
Conversion of Stock, shares converted				0	0
Conversion of stock, shares issued				500
Preferred stock, shares outstanding				194	194
Series A Convertible Preferred Stock | Common Stock
Common Stock
Common stock available in conversion, shares				97,000	97,000
Series A Convertible Preferred Stock | Private Placement
Common Stock
Preferred stock, par or stated value per share				$ 1,000
Convertible price per share				$ 2.00
Series B Convertible Preferred Stock
Common Stock
Preferred stock, shares authorized				11,500,000	11,500,000
Preferred stock, par or stated value per share				$ 0.001	$ 0.001
Conversion of Stock, shares converted				1
Convertible price per share				$ 4.75
Preferred stock, shares outstanding				2,842,158	2,842,158
Series B Convertible Preferred Stock | Issuance Of Common Stock Upon Conversion Of Preferred Stock
Common Stock
Conversion of stock, shares issued				0	0
Series B Convertible Preferred Stock | Common Stock
Common Stock
Preferred stock, shares outstanding				2,842,158	2,842,158
Series B Convertible Preferred Stock | IPO
Common Stock
Preferred stock, shares authorized				11,500,000
Convertible price per share				$ 4.75
Blank check
Common Stock
Preferred stock, shares authorized				50,000,000
Employee Stock Option [Member]
Common Stock
Unrecognized compensation cost				$ 31,700
Unrecognized compensation cost recognition period				1 year 10 months 2 days
RSUs and PRSUs
Common Stock
Unrecognized compensation cost				$ 19,900	$ 20,600
Unrecognized compensation cost recognition period				1 year 7 months 24 days	1 year 8 months 19 days
Aggregate intrinsic value of outstanding non-vested RSUs & PRSUs				$ 28,100	$ 14,500
Vested				1,253,465
Granted				2,729,348
2014 Equity Incentive Plan
Common Stock
Number of shares available				275,625
The 2018 Plan
Common Stock
Number of shares available				9,906,666
Shares authorized			14,000,000					29,700,000				20,700,000				6,000,000
2020 ESPP
Common Stock
Common stock issued, net of offering costs (in shares)				435,459	262,701
Shares authorized			500,000					1,400,000	500,000
Percentage of purchase price			85.00%
Stock-based compensation expense				$ 1,200	$ 1,300	$ 1,200
Unrecognized compensation cost				$ 600
Unrecognized compensation cost recognition period				5 months 12 days
Proceeds from Issuance or Sale of Equity				$ 2,400	$ 1,700
2021 Inducement Plan
Common Stock
Number of shares available				349,428
Shares authorized										2,250,000	1,750,000		1,750,000	1,000,000	1,000,000