Note 7 - Selected Balance Sheet Accounts - Concentration of Credit Risk (Details) - Customer Concentration Risk [Member]	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Autodata Solutions [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	9.00%	10.00%
Autodata Solutions [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	19.00%	16.00%
Carat Detroit [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	10.00%	11.00%
Carat Detroit [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	16.00%	17.00%
Urban Science Applications [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	11.00%	10.00%
Urban Science Applications [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	18.00%	16.00%
Urban Science Applications, Carat Detroit, Ford Direct and Autodata Solutions [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	30.00%	41.00%
Urban Science Applications, Carat Detroit, Ford Direct and Autodata Solutions [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage	53.00%	59.00%
Ford Direct [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage		10.00%
Ford Direct [Member] | Accounts Receivable [Member]
Concentration Risk, Percentage		10.00%