Note 2 - Summary of Significant Accounting Policies (Details Textual) £ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 GBP (£)
Contract with Customer, Asset, after Allowance for Credit Loss, Current, Total	$ 1,900	$ 800
Cash and Cash Equivalents, at Carrying Value, Total	11,998	10,251
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease), Total	1,700
Accounts Receivable, Credit Loss Expense (Reversal)	174	168
Cash, FDIC Insured Amount	250
Cash, Uninsured Amount	7,100
Cash, FSCS Insured Amount	100		£ 75
Cash, Uninsured Amount, FSCS	3,700
Goodwill, Ending Balance	7,547	7,547
Indefinite-Lived Trade Names	8,467	8,467
Advertising Expense	$ 22	$ 11
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	2 years
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	7 years
Revenue Benchmark [Member] | Product Concentration Risk [Member] | Service [Member] | Non-US [Member]
Concentration Risk, Percentage	7.80%	12.10%