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, 2020	$ 12,774	$ 339	$ 2,036	$ 10,398	$ 1
Beginning Balance, Shares at Dec. 31, 2020		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	(1)				(1)
Stock-based compensation expense	4		4
Net income (loss)	229			229
Ending Balance at Sep. 30, 2021	13,006	$ 339	2,040	10,627	0
Ending Balance, Shares at Sep. 30, 2021		3,395,521
Beginning Balance at Jun. 30, 2021	12,988	$ 339	2,039	10,610	0
Beginning Balance, Shares at Jun. 30, 2021		3,395,521
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Other comprehensive loss	0
Stock-based compensation expense	1		1
Net income (loss)	17			17
Ending Balance at Sep. 30, 2021	13,006	$ 339	2,040	10,627	0
Ending Balance, Shares at Sep. 30, 2021		3,395,521
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
Other comprehensive 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 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