Consolidated Statements of Convertible Preferred Stock and Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Convertible Preferred Stock Series A [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2023	$ 5,577	$ 81	$ 554,148	$ (206)	$ (537,680)	$ 16,343
Balance, shares at Dec. 31, 2023	22,358	80,949,697
Stock issued for the exercise of stock options			8			8
Stock issued for the exercise of stock options, shares		9,550
Stock-based compensation			2,589			2,589
Stock-based compensation, shares		161,474
Net loss					(4,507)	(4,507)
Employee stock purchase plan			22			22
Employee stock purchase plan, shares		13,388
Preferred stock issuance	$ (113)	$ 1	111			112
Preferred stock issuance, shares	(450)	998,668
Balance at Mar. 31, 2024	$ 5,464	$ 82	556,878	(206)	(542,187)	14,567
Balance, shares at Mar. 31, 2024	21,908	82,132,777
Balance at Dec. 31, 2024	$ 5,352	$ 85	567,926	(206)	(561,725)	6,080
Balance, shares at Dec. 31, 2024	21,458	85,326,557
Stock issued for the exercise of stock options			1			1
Stock issued for the exercise of stock options, shares		4,103
Stock-based compensation			2,535			2,535
Stock-based compensation, shares		120,908
Net loss					(5,823)	(5,823)
Employee stock purchase plan			30			30
Employee stock purchase plan, shares		14,054
Preferred stock issuance	$ (56)	$ 1	56			57
Preferred stock issuance, shares	(225)	518,055
Balance at Mar. 31, 2025	$ 5,296	$ 86	$ 570,548	$ (206)	$ (567,548)	$ 2,880
Balance, shares at Mar. 31, 2025	21,233	85,983,677