Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Contract with Customer, Liability, Current	$ 66,572	$ 123,529		$ 20,000
Accounts Receivable, Allowance for Credit Loss, Current	205,522	123,165
Capitalized Computer Software, Additions	759,923	518,785
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Ending Balance	515,199	506,153
Advertising Expense	$ 59,000	114,000
Goodwill, Amortization Period (Year)	15 years
Operating Loss Carryforwards, Total	$ 39,400,000
Deferred Tax Assets, Net of Valuation Allowance, Total	1,400,000
Defined Contribution Plan, Employer Discretionary Contribution Amount	152,835	126,436
Operating Lease, Right-of-Use Asset	2,671,266	$ 2,480,902	$ 2,688,412
Operating Lease, Liability, Total	$ 2,842,796		$ 2,775,259
First 3% Matched [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	100.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Over 3% Matched [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	3.00%
Maximum Matched [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	5.00%
Customer Concentration Risk [Member] | Revenue from Contract with Customer Benchmark [Member]
Number of Major Customers	0	0
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	1.00%
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	15.00%