Note 2 - Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Revenue Benchmark [Member] | Carat Detroit [Member]
Concentration Risk, Percentage	12.00%	12.00%
Concentration risk, percent of account receivable	12.00%	12.00%
Revenue Benchmark [Member] | Urban Science Applications [Member]
Concentration Risk, Percentage	12.00%	12.00%
Concentration risk, percent of account receivable	12.00%	12.00%
Revenue Benchmark [Member] | Ford Direct [Member]
Concentration Risk, Percentage		11.00%
Concentration risk, percent of account receivable		11.00%
Revenue Benchmark [Member] | Autodata Solutions [Member]
Concentration Risk, Percentage	13.00%	11.00%
Concentration risk, percent of account receivable	13.00%	11.00%
Revenue Benchmark [Member] | Shift Digital [Member]
Concentration Risk, Percentage	6.00%
Concentration risk, percent of account receivable	6.00%
Revenue Benchmark [Member] | Four Customers [Member]
Concentration Risk, Percentage	43.00%	46.00%
Concentration risk, percent of account receivable	43.00%	46.00%
Accounts Receivable [Member] | Carat Detroit [Member]
Concentration Risk, Percentage	20.00%	19.00%
Concentration risk, percent of account receivable	20.00%	19.00%
Accounts Receivable [Member] | Urban Science Applications [Member]
Concentration Risk, Percentage	18.00%	15.00%
Concentration risk, percent of account receivable	18.00%	15.00%
Accounts Receivable [Member] | Ford Direct [Member]
Concentration Risk, Percentage		16.00%
Concentration risk, percent of account receivable		16.00%
Accounts Receivable [Member] | Autodata Solutions [Member]
Concentration Risk, Percentage	16.00%	12.00%
Concentration risk, percent of account receivable	16.00%	12.00%
Accounts Receivable [Member] | Shift Digital [Member]
Concentration Risk, Percentage	10.00%
Concentration risk, percent of account receivable	10.00%
Accounts Receivable [Member] | Four Customers [Member]
Concentration Risk, Percentage	64.00%	62.00%
Concentration risk, percent of account receivable	64.00%	62.00%