Note 13 - Leases (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2020	May 31, 2021	May 31, 2020	Nov. 30, 2020
Sales-type Lease, Lease Income, Total	$ 0	$ 0		$ 0	$ 0
Operating Lease, Right-of-Use Asset	53,983			53,983		$ 27,879
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	7,392			7,392
Operating Lease, Liability, Current	12,539			12,539		9,537
Finance Lease, Liability, Current	1,296			1,296
Operating Lease, Liability, Noncurrent	41,444			41,444		18,342
Finance Lease, Liability, Noncurrent	6,111			6,111		0
Lease, Cost, Total	5,909		$ 5,481	11,989	13,632
Finance Lease, Right-of-Use Asset, Amortization	119	0		119	0
Finance Lease, Interest Expense	$ 30	$ 0		$ 30	$ 0
Operating Lease, Weighted Average Remaining Lease Term (Month)	4 years 180 days			4 years 180 days
Operating Lease, Weighted Average Discount Rate, Percent	5.50%			5.50%
Lessee, Finance Lease, Term of Contract (Month)	5 years 60 days			5 years 60 days
Lessee, Finance Lease, Discount Rate	4.75%			4.75%
Other Assets [Member]
Operating Lease, Right-of-Use Asset	$ 53,983			$ 53,983		27,879
Finance Lease, Right-of-Use Asset, after Accumulated Amortization, Total	7,392			7,392		0
Accrued Expenses [Member]
Operating Lease, Liability, Current	12,539			12,539		9,537
Finance Lease, Liability, Current	$ 1,296			$ 1,296		$ 0
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Month)	5 years			5 years
Maximum [Member] | Assets Leased to Others, Modular Buildings [Member]
Lessor, Sales-type Lease, Term of Contract (Month)	3 years			3 years
Property, Plant and Equipment, Useful Life (Year)				5 years
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Month)	1 year			1 year
Minimum [Member] | Assets Leased to Others, Modular Buildings [Member]
Property, Plant and Equipment, Useful Life (Year)				3 years