Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)	Common Stock Warrants [Member] Common Stock Outstanding [Member]	Common Stock Warrants [Member] Additional Paid-in Capital [Member]	Common Stock Warrants [Member]	Prefunded Warrants [Member] Common Stock Outstanding [Member]	Prefunded Warrants [Member]	Series F Preferred Stock Warrants [Member] Preferred Stock [Member]	Series F Preferred Stock Warrants [Member] Additional Paid-in Capital [Member]	Series F Preferred Stock Warrants [Member]	Preferred Stock [Member]	Common Stock Outstanding [Member]	Treasury Stock, Common [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2023									1,930	573,644
Balance at Dec. 31, 2023									$ 0	$ 0	$ (181,000)	$ 233,913,000	$ (228,231,000)	$ 5,501,000
Balance (in shares) at Dec. 31, 2023											189
Net loss									0	0	$ 0	0	(1,136,000)	(1,136,000)
Series F Preferred Stock dividends									$ 0	$ 0	$ 0	(44,000)	0	(44,000)
Issuances from Preferred Stock conversions (in shares)									(922)	90,056	0
Series F Preferred Stock conversions									$ 0	$ 0	$ 0	82,000	0	82,000
Stock-based compensation (in shares)									0	0	0
Stock-based compensation									$ 0	$ 0	$ 0	31,000	0	31,000
Balance (in shares) at Mar. 31, 2024									1,008	663,700
Balance at Mar. 31, 2024									$ 0	$ 0	$ (181,000)	233,982,000	(229,367,000)	4,434,000
Balance (in shares) at Mar. 31, 2024											189
Balance (in shares) at Dec. 31, 2023									1,930	573,644
Balance at Dec. 31, 2023									$ 0	$ 0	$ (181,000)	233,913,000	(228,231,000)	5,501,000
Balance (in shares) at Dec. 31, 2023											189
Net loss														(3,159,000)
Balance (in shares) at Sep. 30, 2024									545	1,071,545
Balance at Sep. 30, 2024									$ 0	$ 0	$ (181,000)	236,242,000	(231,390,000)	4,671,000
Balance (in shares) at Sep. 30, 2024											189
Balance (in shares) at Dec. 31, 2023									1,930	573,644
Balance at Dec. 31, 2023									$ 0	$ 0	$ (181,000)	233,913,000	(228,231,000)	5,501,000
Balance (in shares) at Dec. 31, 2023											189
Balance (in shares) at Dec. 31, 2024									545	1,144,926
Balance at Dec. 31, 2024									$ 0	$ 0	$ (181,000)	236,458,000	(232,274,000)	$ 4,003,000
Balance (in shares) at Dec. 31, 2024											189			189
Balance (in shares) at Mar. 31, 2024									1,008	663,700
Balance at Mar. 31, 2024									$ 0	$ 0	$ (181,000)	233,982,000	(229,367,000)	$ 4,434,000
Balance (in shares) at Mar. 31, 2024											189
Net loss									$ 0	$ 0	$ 0	0	(983,000)	(983,000)
Issuances related to Common Warrant exercises (in shares)									1,648	0	0
Common warrant exercise, net of fees									$ 0	$ 0	$ 0	1,478,000	0	1,478,000
Series F Preferred Stock dividends									$ 0	$ 0	$ 0	(20,000)	0	(20,000)
Issuances from Preferred Stock conversions (in shares)									(2,111)	198,912	0
Series F Preferred Stock conversions									$ 0	$ 0	$ 0	112,000	0	112,000
Stock Issued During Period, Shares, Warrants Exercised (in shares)									1,648	0	0
Common warrant exercise, net of fees									$ 0	$ 0	$ 0	1,478,000	0	1,478,000
Stock-based compensation (in shares)									0	0	0
Stock-based compensation									$ 0	$ 0	$ 0	31,000	0	31,000
Balance (in shares) at Jun. 30, 2024									545	862,612
Balance at Jun. 30, 2024									$ 0	$ 0	$ (181,000)	235,583,000	(230,350,000)	5,052,000
Balance (in shares) at Jun. 30, 2024											189
Net loss									$ 0	$ 0	$ 0	0	(1,040,000)	(1,040,000)
Issuances related to Common Warrant exercises (in shares)			208,933						0	208,933	0
Common warrant exercise, net of fees									$ 0	$ 0	$ 0	672,000	0	672,000
Series F Preferred Stock dividends									$ 0	$ 0	$ 0	(13,000)	0	(13,000)
Stock Issued During Period, Shares, Warrants Exercised (in shares)			208,933						0	208,933	0
Common warrant exercise, net of fees									$ 0	$ 0	$ 0	672,000	0	672,000
Balance (in shares) at Sep. 30, 2024									545	1,071,545
Balance at Sep. 30, 2024									$ 0	$ 0	$ (181,000)	236,242,000	(231,390,000)	4,671,000
Balance (in shares) at Sep. 30, 2024											189
Balance (in shares) at Dec. 31, 2024									545	1,144,926
Balance at Dec. 31, 2024									$ 0	$ 0	$ (181,000)	236,458,000	(232,274,000)	$ 4,003,000
Balance (in shares) at Dec. 31, 2024											189			189
Net loss									0	0	$ 0	0	(672,000)	$ (672,000)
Issuances related to Common Warrant exercises (in shares)	10,000
Common warrant exercise, net of fees		$ 31,000	$ 31,000
Series F Preferred Stock dividends									$ 0	$ 0	0	(12,000)	0	(12,000)
Stock Issued During Period, Shares, Warrants Exercised (in shares)	10,000
Common warrant exercise, net of fees		31,000	$ 31,000
Balance (in shares) at Mar. 31, 2025									545	1,154,926
Balance at Mar. 31, 2025									$ 0	$ 0	$ (181,000)	236,477,000	(232,946,000)	3,350,000
Balance (in shares) at Mar. 31, 2025											189
Balance (in shares) at Dec. 31, 2024									545	1,144,926
Balance at Dec. 31, 2024									$ 0	$ 0	$ (181,000)	236,458,000	(232,274,000)	$ 4,003,000
Balance (in shares) at Dec. 31, 2024											189			189
Net loss														$ (3,567,000)
Issuances related to Common Warrant exercises (in shares)			521,725
Stock Issued During Period, Shares, Warrants Exercised (in shares)			521,725
Balance (in shares) at Sep. 30, 2025									150	3,207,399
Balance at Sep. 30, 2025									$ 0	$ 0	$ (181,000)	245,846,000	(235,841,000)	$ 9,824,000
Balance (in shares) at Sep. 30, 2025											189			189
Balance (in shares) at Mar. 31, 2025									545	1,154,926
Balance at Mar. 31, 2025									$ 0	$ 0	$ (181,000)	236,477,000	(232,946,000)	$ 3,350,000
Balance (in shares) at Mar. 31, 2025											189
Net loss									0	0	$ 0	0	(605,000)	(605,000)
Issuances related to Common Warrant exercises (in shares)	394,864
Common warrant exercise, net of fees		1,241,000	$ 1,241,000
Series F Preferred Stock dividends									$ 0	$ 0	$ 0	(13,000)	0	(13,000)
Issuance, preferred (in shares)									0	0	0
Proceeds from Private Placement, net of fees									$ 0	$ 0	$ 0	6,925,000	0	6,925,000
Advisor warrant issuance									$ 0	$ 0	$ 0	335,000	0	335,000
Issuances from Preferred Stock conversions (in shares)									(190)	45,163	0
Series F Preferred Stock conversions									$ 0	$ 0	$ 0	19,000	0	19,000
Stock Issued During Period, Shares, Warrants Exercised (in shares)	394,864
Common warrant exercise, net of fees		1,241,000	$ 1,241,000
Balance (in shares) at Jun. 30, 2025									355	1,594,953
Balance at Jun. 30, 2025									$ 0	$ 0	$ (181,000)	244,984,000	(233,551,000)	11,252,000
Balance (in shares) at Jun. 30, 2025											189
Net loss									0	0	$ 0	0	(2,290,000)	(2,290,000)
Issuances related to Common Warrant exercises (in shares)	116,861		116,861	1,283,131	1,283,131	575
Common warrant exercise, net of fees		367,000	$ 367,000				$ 516,000	$ 516,000
Series F Preferred Stock dividends									$ 0	$ 0	$ 0	(4,000)	0	(4,000)
Issuances from Preferred Stock conversions (in shares)									(780)	212,454	0
Series F Preferred Stock conversions									$ 0	$ 0	$ 0	20,000	0	20,000
Stock Issued During Period, Shares, Warrants Exercised (in shares)	116,861		116,861	1,283,131	1,283,131	575
Common warrant exercise, net of fees		$ 367,000	$ 367,000				$ 516,000	$ 516,000
Finance costs for June 2025 private placement									$ 0	$ 0	0	(37,000)	0	(37,000)
Balance (in shares) at Sep. 30, 2025									150	3,207,399
Balance at Sep. 30, 2025									$ 0	$ 0	$ (181,000)	$ 245,846,000	$ (235,841,000)	$ 9,824,000
Balance (in shares) at Sep. 30, 2025											189			189