Note 7 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($)	Mar. 31, 2023	Dec. 31, 2022
Payroll expenses and taxes payable	$ 337,000	$ 138,000
Commissions and bonuses payable and general accrued liabilities	50,000	695,000
Accrued liabilities	$ 387,000	$ 833,000	[1]

[1] The condensed consolidated balance sheet as of December 31, 2022, has been prepared using information from the audited consolidated balance sheet as of that date.