Note 7 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Payroll expenses and tax payable	$ 138,000	$ 187,000
Commission and bonuses payable and general accrued liabilities	695,000	1,063,000
Total accrued liabilities	$ 833,000	$ 1,250,000