Note 3 - Revenue Recognition (Tables)

3 Months Ended

Feb. 29, 2020

Notes Tables

Contract With Customer Asset and Liability, Subject to Change [Table Text Block]

	February 29, 2020		December 1, 2019
Assets
Accounts receivable	$	71,126	$	58,853
Total Assets		71,126		58,853
Liabilities
Contract liabilities - current		597,890		622,724
Contract liabilities - long-term		97,482		80,110
Total Contract Liabilities	$	695,372	$	702,834

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

	Accounts Receivable			Contract Liabilities
Balance at December 1, 2019	$	58,853		$	702,834
Revenue Recognized		173,344			(304,635	)
Amounts (collected) or invoiced, net		(161,071	)		297,173
Balance at February 29, 2020	$	71,126		$	695,372

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

(a)          2020	$	52,743
2021		27,252
2022		18,667
2023		13,995
2024		11,864
Thereafter		30,489
Total	$	155,010