Note 15 - Legal Proceedings (Details Textual) - USD ($)		2 Months Ended
	Feb. 02, 2016	Mar. 29, 2021	Dec. 31, 2020
Counterclaim By Former Chief Revenue Officer Against USIO [Member] | Pending Litigation [Member] | Minimum [Member] | Subsequent Event [Member]
Loss Contingency, Damages Sought, Value		$ 1,000,000
C2Go [Member]
Financing Receivable, after Allowance for Credit Loss, Total	$ 200,000
Notes Receivable, Stated Interest Rate	10.00%
Notes Receivable, Term (Month)	1 year 180 days
Financing Receivable, before Allowance for Credit Loss, Total			$ 145,000
Financing Receivable, Allowance for Credit Loss, Ending Balance			$ 145,000