CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Issued [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Dec. 31, 2021	$ 13,188	$ 339	$ 2,041	$ 10,808	$ 0
Beginning Balance, Shares at Dec. 31, 2021		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options	$ 31	$ 1	30
Exercise of common stock options, shares	7,500	7,500
Other comprehensive income (loss)	$ 0
Stock-based compensation expense	4		4
Net income (loss)	(171)			(171)
Ending Balance at Sep. 30, 2022	13,052	$ 340	2,075	10,637	0
Ending Balance, Shares at Sep. 30, 2022		3,403,021
Beginning Balance at Jun. 30, 2022	12,899	$ 339	2,043	10,515	2
Beginning Balance, Shares at Jun. 30, 2022		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options	31	$ 1	30
Exercise of common stock options, shares		7,500
Other comprehensive income (loss)	(2)				(2)
Stock-based compensation expense	2		2
Net income (loss)	122			122
Ending Balance at Sep. 30, 2022	13,052	$ 340	2,075	10,637	0
Ending Balance, Shares at Sep. 30, 2022		3,403,021
Beginning Balance at Dec. 31, 2022	$ 13,414	$ 342	2,163	10,908	1
Beginning Balance, Shares at Dec. 31, 2022		3,428,021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options, shares	0
Other comprehensive income (loss)	$ (3)				(3)
Stock-based compensation expense	38		38
Net income (loss)	80			80
Ending Balance at Sep. 30, 2023	13,529	$ 342	2,201	10,988	(2)
Ending Balance, Shares at Sep. 30, 2023		3,428,021
Beginning Balance at Jun. 30, 2023	13,484	$ 342	2,163	10,980	(1)
Beginning Balance, Shares at Jun. 30, 2023		3,428,021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive income (loss)	(1)				(1)
Stock-based compensation expense	38		38
Net income (loss)	8			8
Ending Balance at Sep. 30, 2023	$ 13,529	$ 342	$ 2,201	$ 10,988	$ (2)
Ending Balance, Shares at Sep. 30, 2023		3,428,021