Note 7 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021	[1]	Mar. 31, 2021
Payroll expenses and taxes payable	$ 276,000			$ 187,000
Commissions and bonuses payable and general accrued liabilities	266,000			1,063,000
Total accrued liabilities	$ 542,000	$ 1,250,000		$ 1,250,000

[1] The condensed consolidated balance sheet as of December 31, 2021 has been prepared using information from the audited consolidated balance sheet as of that date.