Note 3 - Revenue Recognition - Changes in Contract Balances (Details)	12 Months Ended
	Nov. 30, 2019 USD ($)
Balance, accounts receivable	$ 36,337
Revenue Recognized, accounts receivable	671,602
Amounts (collected) or invoiced, net, accounts receivable	(649,086)
Balance, accounts receivable	58,853
Balance, contract liabilities	754,542
Revenue Recognized, contract liabilities	(1,141,617)
Amounts (collected) or invoiced, net, contract liabilities	1,089,909
Balance, contract liabilities	$ 702,834