Note 19 - Fair Value of Financial Instruments - Fair Values for Level 3 Measurements (Details) - Fair Value, Inputs, Level 3 [Member] - Fair Value, Nonrecurring [Member]	Dec. 01, 2020 USD ($)
Deferred service fees	$ 3,626
Measurement Input, Discount Rate [Member] | Valuation, Cost Approach [Member]
Deferred service feesDeferred service fees, measurement input	0.025
Measurement Input, Profit Margin [Member] | Valuation, Cost Approach [Member] | Minimum [Member]
Deferred service feesDeferred service fees, measurement input	0.178
Measurement Input, Profit Margin [Member] | Valuation, Cost Approach [Member] | Maximum [Member]
Deferred service feesDeferred service fees, measurement input	0.211
Customer Relationships [Member]
Finite-lived assets, fair value	$ 15,000
Customer Relationships [Member] | Measurement Input, Long-term Revenue Growth Rate [Member] | Multi-period Excess Earnings [Member]
Finite-lived intangible assets, measurement input	0.030
Customer Relationships [Member] | Measurement Input, Attrition Rate [Member] | Multi-period Excess Earnings [Member]
Finite-lived intangible assets, measurement input	0.123
Customer Relationships [Member] | Measurement Input, Discount Rate [Member] | Multi-period Excess Earnings [Member]
Finite-lived intangible assets, measurement input	0.295
Trade Names [Member]
Finite-lived assets, fair value	$ 4,550
Trade Names [Member] | Measurement Input, Discount Rate [Member] | Relief from Royalty [Member]
Finite-lived intangible assets, measurement input	0.295
Trade Names [Member] | Measurement Input, Royalty Rate [Member] | Relief from Royalty [Member]
Finite-lived intangible assets, measurement input	0.040