Note 7 - Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Allowance for doubtful accounts	$ 18,000	$ 16,000
Accrued expenses	581,000	691,000
Share-based compensation	1,177,000	1,072,000
Accrued bonuses	12,000	96,000
Uncertain tax positions	326,000	256,000
Deferred Tax Assets, Research and Expenditures	2,903,000	856,000
Deferred Tax Assets, Other	0	78,000
Gross deferred tax assets	5,017,000	3,065,000
Deferred tax assets	5,017,000	3,065,000
Deferred tax liabilities:
Prepaid expenses	145,000	135,000
Deferred contract costs	354,000	601,000
Property and equipment	1,966,000	1,066,000
Intangible assets	6,636,000	6,523,000
Deferred Tax Liabilities, Other	55,000	0
Deferred tax liabilities	9,156,000	8,325,000
Net deferred tax liabilities	$ (4,139,000)	$ (5,260,000)