Note 2 - Revised Prior Period Financial Statements (Details Textual) - USD ($)	3 Months Ended						6 Months Ended		9 Months Ended		12 Months Ended			24 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total	$ (137,000)	$ (265,000)	$ (152,000)	$ (187,000)	$ 79,000	$ (108,000)	$ (417,000)	$ (29,000)	$ (554,000)	$ (216,000)	$ (620,000)	$ (96,000)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	(1,424,000)	(1,287,000)	(1,022,000,000)	(989,000)	(802,000)	(881,000,000)	(1,287,000)	(802,000)	(1,424,000)	(989,000)	$ (1,489,000)	(869,000)		$ (869,000)
Previously Reported [Member]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total	0	0	0	0	0	0	0	0	0	0		0
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0		0		0
Foreign Currency Exchange Rates in Unconsolidated Affiliate Operation in India [Member]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent, Total												$ 96,000	$ 773,000	$ 869,000