Note 8 - Accrued Liabilities - Accrued Liabilities (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Payroll expenses and taxes payable	$ 157,000	$ 138,000
Commissions and bonuses payable and general accrued liabilities	946,000	695,000
Total accrued liabilities	$ 1,103,000	$ 833,000