Condensed Consolidated Statements of Stockholders' Equity (Deficit) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Rights Offering [Member] Common Stock [Member]	Rights Offering [Member] Additional Paid-in Capital [Member]	Rights Offering [Member] AOCI Attributable to Parent [Member]	Rights Offering [Member] Retained Earnings [Member]	Rights Offering [Member]	Private Placement [Member] Common Stock [Member]	Private Placement [Member] Additional Paid-in Capital [Member]	Private Placement [Member] AOCI Attributable to Parent [Member]	Private Placement [Member] Retained Earnings [Member]	Private Placement [Member]	ATM Offering [Member] Common Stock [Member]	ATM Offering [Member] Additional Paid-in Capital [Member]	ATM Offering [Member] AOCI Attributable to Parent [Member]	ATM Offering [Member] Retained Earnings [Member]	ATM Offering [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2022																37,235
Balance at Dec. 31, 2022																$ 37	$ 292,420	$ 0	$ (294,705)	$ (2,248)
Issuance of common stock upon exercise of warrants (in shares)																7,238
Issuance of common stock upon exercise of warrants																$ 7	14,821	0	0	14,828
Issuance of common stock upon exercise of stock options (in shares)																148
Issuance of common stock upon exercise of stock options																$ 0	367	0	0	367
Issuance of shares under employee stock purchase plan (in shares)																347
Issuance of shares under employee stock purchase plan																$ 1	394	0	0	395
Stock-based compensation expense																0	3,837	0	0	3,837
Net loss																$ 0	0	0	(30,277)	(30,277)
Rights offering deemed pro-rata distribution to shareholders (Note 6)																				0
Issuance of common stock as part of debt extinguishment, net of issuance costs of $6 (in shares)						10,023
Issuance of common stock as part of debt extinguishment, net of issuance costs of $6						$ 10	$ 65,233	$ 0	$ 0	$ 65,243
Balance (in shares) at Sep. 30, 2023																54,991
Balance at Sep. 30, 2023																$ 55	377,072	0	(324,982)	52,145
Balance (in shares) at Jun. 30, 2023																54,771
Balance at Jun. 30, 2023																$ 55	374,861	0	(314,416)	60,500
Issuance of common stock upon exercise of stock options (in shares)																135
Issuance of common stock upon exercise of stock options																$ 0	309	0	0	309
Issuance of shares under employee stock purchase plan (in shares)																85
Issuance of shares under employee stock purchase plan																$ 0	103	0	0	103
Stock-based compensation expense																0	1,798	0	0	1,798
Net loss																0	0	0	(10,566)	(10,566)
Warrant exercise, issuance cost adjustment																$ 0	1	0	0	1
Balance (in shares) at Sep. 30, 2023																54,991
Balance at Sep. 30, 2023																$ 55	377,072	0	(324,982)	52,145
Balance (in shares) at Dec. 31, 2023																55,144
Balance at Dec. 31, 2023																$ 55	381,220	0	(336,915)	44,360
Issuance of shares (in shares)	6,000										1
Issuance of shares	$ 6	$ 59,630	$ 0	$ 0	$ 59,636						$ 0	$ 0	$ 0	$ 0	$ 0
Issuance of common stock upon exercise of warrants (in shares)																142
Issuance of common stock upon exercise of warrants																$ 1	1,565	0	0	1,566
Issuance of common stock upon exercise of stock options (in shares)																111
Issuance of common stock upon exercise of stock options																$ 0	498	0	0	498
Issuance of shares under employee stock purchase plan (in shares)																118
Issuance of shares under employee stock purchase plan																$ 0	478	0	0	478
Stock-based compensation expense																0	6,793	0	0	6,793
Net loss																0	0	0	(34,200)	(34,200)
Issuance of equity-classified subscription rights as part of rights offering (Note 6)																0	47,700	0	0	47,700
Rights offering deemed pro-rata distribution to shareholders (Note 6)																$ 0	(47,700)	0	0	(47,700)
Balance (in shares) at Sep. 30, 2024																61,516
Balance at Sep. 30, 2024																$ 62	450,184	0	(371,115)	79,131
Balance (in shares) at Jun. 30, 2024																55,228
Balance at Jun. 30, 2024																$ 55	385,349	0	(358,435)	26,969
Issuance of shares (in shares)	6,000										1
Issuance of shares	$ 6	$ 59,630	$ 0	$ 0	$ 59,636						$ 0	$ 0	$ 0	$ 0	$ 0
Issuance of common stock upon exercise of warrants (in shares)																142
Issuance of common stock upon exercise of warrants																$ 1	1,565	0	0	1,566
Issuance of common stock upon exercise of stock options (in shares)																105
Issuance of common stock upon exercise of stock options																$ 0	476	0	0	476
Issuance of shares under employee stock purchase plan (in shares)																40
Issuance of shares under employee stock purchase plan																$ 0	182	0	0	182
Stock-based compensation expense																0	2,982	0	0	2,982
Net loss																$ 0	0	0	(12,680)	(12,680)
Balance (in shares) at Sep. 30, 2024																61,516
Balance at Sep. 30, 2024																$ 62	$ 450,184	$ 0	$ (371,115)	$ 79,131