Note 1 - Summary of Significant Accounting Policies (Details Textual)	1 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax		$ (2,569,000)	$ (0)	$ (0)
Incremental Costs of Obtaining a Contract, Deferred During Period		454,000	1,900,000	3,700,000
Capitalized Contract Cost, Net, Noncurrent		2,441,000	3,772,000
Capitalized Contract Cost, Impairment Loss		14,000	31,000	63,000
Capitalized Computer Software, Additions		3,600,000	2,800,000	2,700,000
Asset Impairment Charges, Total		0	0
Impairment of Intangible Assets (Excluding Goodwill), Total		0	0	$ 0
Goodwill, Impairment Loss		0	$ 0
Number of Operating Segments	1		1	6
Number of Reporting Units	1
Income Tax Credits and Adjustments		36,000	$ 10,000	$ 45,000
Cash Equivalents, at Carrying Value, Total		24,900,000	6,300,000
Operating Lease, Impairment Loss			324,000
Excess Loss Coverage Per Person		150,000
Claims Loss Coverage, Minimum Aggregate Deductible		4,700,000	3,200,000	$ 2,800,000
Self Insurance Reserve, Current		$ 424,000	$ 406,000
Common Class A [Member]
Stock Options Excluded from Computation of Earnings Per Share, Amount (in shares) | shares		83,070	127,185	65,127
Cyber Attack [Member] | Recoveries Received Direct by the Company [Member]
Proceeds from Insurance Settlement, Operating Activities				$ 3,300,000
Cyber Attack [Member] | Recoveries Paid Directly by Insurer to Outside Vendor [Member]
Proceeds from Insurance Settlement, Operating Activities				447,000
Cyber Attack [Member] | Reimbursement for Lost Revenue [Member]
Insurance Recoveries				533,000
Property Damage Excluding Cyber Attack [Member] | Other Income [Member]
Insurance Recoveries				260,000
Canadian Subsidiary [Member]
Goodwill, Impairment Loss				$ 714,000
Number of Customers		1
Minimum [Member]
Capitalized Contract Cost, Amortization Period (Year)			3 years
Minimum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life (Year)		2 years
Minimum [Member] | Computer Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)		3 years
Minimum [Member] | Software and Software Development Costs [Member]
Property, Plant and Equipment, Useful Life (Year)		1 year
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)		7 years
Maximum [Member]
Capitalized Contract Cost, Amortization Period (Year)			5 years
Maximum [Member] | Furniture and Fixtures [Member]
Property, Plant and Equipment, Useful Life (Year)		10 years
Maximum [Member] | Computer Equipment [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Maximum [Member] | Software and Software Development Costs [Member]
Property, Plant and Equipment, Useful Life (Year)		5 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment, Useful Life (Year)		40 years