Note 8 - Stockholder's Equity - Schedule of Stockholder's Equity (Details) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
	Jan. 25, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Balance		$ 23,406	$ 21,517	$ 21,311	$ 17,826	$ 19,007	$ 20,135	$ 21,311	$ 20,135
Common stock issued under restricted stock units (in shares)					27,418
Common stock issued under restricted stock units		0			$ 0
Share-based compensation expense-stock options		78	77	55	44	61	58
Share-based compensation expense-restricted stock units		146	148	121	641	63	69
Treasury shares	$ (650)			(651)
Net income (loss)		2,357	1,664	681	$ 90	(1,340)	(1,270)	4,702	$ (2,520)
Common stock issued - exercised warrants		0
Balance (in shares)					3,722,970				3,722,970
Balance		$ 25,987	23,406	21,517	$ 18,614	17,826	19,007	$ 25,987	$ 18,614
Common stock issued (in shares)					1,254
Common stock issued					$ 13	35	15
Restricted Stock Units (RSUs) [Member]
Common stock issued under restricted stock units			$ 0	$ 0		$ 0	$ 0
Common Stock [Member]
Balance (in shares)		3,877,798	3,871,792	3,867,082	3,694,298	3,689,717	3,686,939	3,867,082	3,686,939
Balance		$ 2,327	$ 2,323	$ 2,320	$ 2,217	$ 2,214	$ 2,212	$ 2,320	$ 2,212
Common stock issued under restricted stock units (in shares)		21,327
Common stock issued under restricted stock units		$ 12			16
Share-based compensation expense-stock options		0	0	0	0	0	0
Share-based compensation expense-restricted stock units		0	0	0	0	0	0
Net income (loss)		$ 0	$ 0	$ 0	0	$ 0	$ 0
Common stock issued - exercised warrants (in shares)		6,018
Common stock issued - exercised warrants		$ 4
Balance (in shares)		3,905,143	3,877,798	3,871,792		3,694,298	3,689,717	3,905,143
Balance		$ 2,343	$ 2,327	$ 2,323	2,234	$ 2,217	$ 2,214	$ 2,343	2,234
Common stock issued (in shares)						2,661	858
Common stock issued					1	$ 2	$ 1
Common Stock [Member] | Restricted Stock Units (RSUs) [Member]
Common stock issued under restricted stock units (in shares)			6,006	4,710		1,920	1,920
Common stock issued under restricted stock units			$ 4	$ 3		$ 1	$ 1
Additional Paid-in Capital [Member]
Balance		48,996	48,775	48,602	45,600	45,444	45,304	48,602	45,304
Common stock issued under restricted stock units		(12)			(16)
Share-based compensation expense-stock options		78	77	55	44	61	58
Share-based compensation expense-restricted stock units		146	148	121	641	63	69
Treasury shares				0
Net income (loss)		0	0	0	0	0	0
Common stock issued - exercised warrants		(4)
Balance		49,204	48,996	48,775	46,281	45,600	45,444	49,204	46,281
Common stock issued					12	33	14
Additional Paid-in Capital [Member] | Restricted Stock Units (RSUs) [Member]
Common stock issued under restricted stock units			(4)	(3)		(1)	(1)
Retained Earnings [Member]
Balance		(21,864)	(23,528)	(24,209)	(24,589)	(23,249)	(21,979)	(24,209)	(21,979)
Common stock issued under restricted stock units		0			0
Share-based compensation expense-stock options		0	0	0	0	0	0
Share-based compensation expense-restricted stock units		0	0	0	0	0	0
Treasury shares				0
Net income (loss)		2,357	1,664	681	90	(1,340)	(1,270)
Common stock issued - exercised warrants		0
Balance		(19,507)	(21,864)	(23,528)	(24,499)	(24,589)	(23,249)	(19,507)	(24,499)
Common stock issued					0	0	0
Retained Earnings [Member] | Restricted Stock Units (RSUs) [Member]
Common stock issued under restricted stock units			0	0		0	0
Treasury Stock, Common [Member]
Balance		(6,053)	(6,053)	(5,402)	(5,402)	(5,402)	(5,402)	(5,402)	(5,402)
Common stock issued under restricted stock units		0			0
Share-based compensation expense-stock options		0	0	0	0	0	0
Share-based compensation expense-restricted stock units		0	0	0	0	0	0
Treasury shares				(651)
Net income (loss)		0	0	0	0	0	0
Common stock issued - exercised warrants		0
Balance		$ (6,053)	(6,053)	(6,053)	(5,402)	(5,402)	(5,402)	$ (6,053)	$ (5,402)
Common stock issued					$ 0	0	0
Treasury Stock, Common [Member] | Restricted Stock Units (RSUs) [Member]
Common stock issued under restricted stock units			$ 0	$ 0		$ 0	$ 0