Condensed Consolidated Statements of Stockholders' Equity (Current Period Unaudited) - USD ($)	Total	Common Stock [Member]	Preferred Stock [Member] Convertible Preferred Stock	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock, Common [Member]
Balance (in shares) at Dec. 31, 2022		126,624,110	582
Balance at Dec. 31, 2022	$ 117,964,000	$ 22,792,000	$ 0	$ 251,366,000	$ (156,194,000)	$ 0
Stock-based compensation	1,573,000	0	0	1,573,000	0	0
Net loss	(6,281,000)	$ 0	$ 0	0	(6,281,000)	0
Balance (in shares) at Mar. 31, 2023		126,624,110	582
Balance at Mar. 31, 2023	113,256,000	$ 22,792,000	$ 0	252,939,000	(162,475,000)	0
Balance (in shares) at Dec. 31, 2022		126,624,110	582
Balance at Dec. 31, 2022	117,964,000	$ 22,792,000	$ 0	251,366,000	(156,194,000)	0
Net loss	(22,340,000)
Balance (in shares) at Sep. 30, 2023		125,304,064	582
Balance at Sep. 30, 2023	98,251,000	$ 22,792,000	$ 0	255,468,000	(178,534,000)	(1,475,000)
Balance (in shares) at Mar. 31, 2023		126,624,110	582
Balance at Mar. 31, 2023	113,256,000	$ 22,792,000	$ 0	252,939,000	(162,475,000)	0
Stock-based compensation	1,603,000	0	0	1,603,000	0	0
Common stock repurchased	(152,000)	$ 0	0	0	0	(152,000)
Common stock repurchased, shares		(119,382)
Net loss	(9,830,000)	$ 0	$ 0	0	(9,830,000)	0
Balance (in shares) at Jun. 30, 2023		126,504,728	582
Balance at Jun. 30, 2023	104,877,000	$ 22,792,000	$ 0	254,542,000	(172,305,000)	(152,000)
Stock-based compensation	926,000	0	0	926,000	0	0
Common stock repurchased	(1,323,000)	$ 0	0	0	0	(1,323,000)
Common stock repurchased, shares		(1,200,664)
Net loss	(6,229,000)	$ 0	$ 0	0	(6,229,000)	0
Balance (in shares) at Sep. 30, 2023		125,304,064	582
Balance at Sep. 30, 2023	98,251,000	$ 22,792,000	$ 0	255,468,000	(178,534,000)	(1,475,000)
Balance (in shares) at Dec. 31, 2023		125,304,064	582
Balance at Dec. 31, 2023	91,016,000	$ 22,792,000	$ 0	255,987,000	(186,288,000)	(1,475,000)
Stock-based compensation	417,000	0	0	417,000	0	0
Issuance of common stock upon warrant exercise	204,000	$ 37,000	0	167,000	0	0
Issuance of common stock upon warrant exercise, shares		203,750
Net loss	(5,878,000)	$ 0	$ 0	0	(5,878,000)	0
Balance (in shares) at Mar. 31, 2024		125,507,814	582
Balance at Mar. 31, 2024	85,759,000	$ 22,829,000	$ 0	256,571,000	(192,166,000)	(1,475,000)
Balance (in shares) at Dec. 31, 2023		125,304,064	582
Balance at Dec. 31, 2023	91,016,000	$ 22,792,000	$ 0	255,987,000	(186,288,000)	(1,475,000)
Net loss	(19,157,000)
Balance (in shares) at Sep. 30, 2024		125,801,254	582
Balance at Sep. 30, 2024	73,681,000	$ 22,882,000	$ 0	257,719,000	(205,445,000)	(1,475,000)
Balance (in shares) at Mar. 31, 2024		125,507,814	582
Balance at Mar. 31, 2024	85,759,000	$ 22,829,000	$ 0	256,571,000	(192,166,000)	(1,475,000)
Stock-based compensation	352,000	0	0	352,000	0	0
Issuance of common stock upon warrant exercise	100,000	$ 18,000	0	82,000	0	0
Issuance of common stock upon warrant exercise, shares		100,000
Issuance of common stock upon option exercise (in Shares)		268,998
Issuance of common stock upon option exercise	228,000	$ 48,000	0	180,000	0	0
Shares withheld related to cashless exercise of options and taxes (in shares)		(119,396)
Shares withheld related to cashless exercise of options and taxes	(228,000)	$ (21,000)	0	(207,000)	0	0
Net loss	(6,049,000)	$ 0	$ 0	0	(6,049,000)	0
Balance (in shares) at Jun. 30, 2024		125,757,416	582
Balance at Jun. 30, 2024	80,162,000	$ 22,874,000	$ 0	256,978,000	(198,215,000)	(1,475,000)
Stock-based compensation	749,000	$ 0	0	749,000	0	0
Issuance of common stock upon option exercise (in Shares)		75,000
Issuance of common stock upon option exercise	45,000	$ 14,000	0	31,000	0	0
Shares withheld related to cashless exercise of options and taxes (in shares)		(31,162)
Shares withheld related to cashless exercise of options and taxes	(45,000)	$ (6,000)	0	(39,000)	0	0
Net loss	(7,230,000)	$ 0	$ 0	0	(7,230,000)	0
Balance (in shares) at Sep. 30, 2024		125,801,254	582
Balance at Sep. 30, 2024	$ 73,681,000	$ 22,882,000	$ 0	$ 257,719,000	$ (205,445,000)	$ (1,475,000)