CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income
Beginning balance (in shares) at Dec. 31, 2022		198,575,016
Beginning balance at Dec. 31, 2022	$ 98,329	$ 20	$ 878,500	$ (780,137)	$ (54)
Ending balance (in shares) at Mar. 31, 2023		214,462,050
Ending balance at Mar. 31, 2023	125,421	$ 21	932,330	(806,910)	(20)
Beginning balance (in shares) at Dec. 31, 2022		198,575,016
Beginning balance at Dec. 31, 2022	98,329	$ 20	878,500	(780,137)	(54)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock purchase plan (in shares)		165,969
Issuance of common stock under employee stock purchase plan	138		138
Issuance of common stock for services (in shares)		86,095
Issuance of common stock for services	337		337
Issuance of common stock upon exercise of options (in shares)		98,994
Issuance of common stock upon exercise of options	211		211
Issuance of common stock upon vesting of restricted stock units (in shares)		423,074
Issuance of common stock in at the market offering (in shares)		18,513,773
Issuance of common stock in at the market offering	62,085	$ 2	62,083
Stock-based compensation	6,111		6,111
Unrealized losses on available-for-sale securities	(156)				(156)
Net loss	(43,894)			(43,894)
Ending balance (in shares) at Jun. 30, 2023		217,862,921
Ending balance at Jun. 30, 2023	123,161	$ 22	947,380	(824,031)	(210)
Beginning balance (in shares) at Mar. 31, 2023		214,462,050
Beginning balance at Mar. 31, 2023	125,421	$ 21	932,330	(806,910)	(20)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for services (in shares)		86,095
Issuance of common stock for services	337		337
Issuance of common stock upon exercise of options (in shares)		62,993
Issuance of common stock upon exercise of options	149		149
Issuance of common stock upon vesting of restricted stock units (in shares)		215,301
Issuance of common stock in at the market offering (in shares)		3,036,482
Issuance of common stock in at the market offering	11,366	$ 1	11,365
Stock-based compensation	3,199		3,199
Unrealized losses on available-for-sale securities	(190)				(190)
Net loss	(17,121)			(17,121)
Ending balance (in shares) at Jun. 30, 2023		217,862,921
Ending balance at Jun. 30, 2023	123,161	$ 22	947,380	(824,031)	(210)
Beginning balance (in shares) at Dec. 31, 2023		232,453,190
Beginning balance at Dec. 31, 2023	166,816	$ 23	1,012,773	(846,204)	224
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock purchase plan (in shares)		253,312
Issuance of common stock under employee stock purchase plan	1,038		1,038
Issuance of common stock for services (in shares)		40,549
Issuance of common stock for services	$ 257		257
Issuance of common stock upon exercise of options (in shares)	1,564,000	1,564,269
Issuance of common stock upon exercise of options	$ 3,791		3,791
Issuance of common stock upon vesting of restricted stock units (in shares)		1,090,078
Stock-based compensation	18,385		18,385
Unrealized losses on available-for-sale securities	(325)				(325)
Net loss	(42,972)			(42,972)
Ending balance (in shares) at Jun. 30, 2024		235,401,398
Ending balance at Jun. 30, 2024	146,990	$ 23	1,036,244	(889,176)	(101)
Beginning balance (in shares) at Mar. 31, 2024		233,959,744
Beginning balance at Mar. 31, 2024	150,891	$ 23	1,023,610	(872,722)	(20)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for services (in shares)		40,549
Issuance of common stock for services	257		257
Issuance of common stock upon exercise of options (in shares)		862,691
Issuance of common stock upon exercise of options	1,608		1,608
Issuance of common stock upon vesting of restricted stock units (in shares)		538,414
Stock-based compensation	10,769		10,769
Unrealized losses on available-for-sale securities	(81)				(81)
Net loss	(16,454)			(16,454)
Ending balance (in shares) at Jun. 30, 2024		235,401,398
Ending balance at Jun. 30, 2024	$ 146,990	$ 23	$ 1,036,244	$ (889,176)	$ (101)