Note 4 - Contract Receivables, Contract Assets and Contract Liabilities (Tables)

9 Months Ended

Aug. 31, 2021

Notes Tables

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

	August 31, 2021		November 30, 2020
Receivables	$	2,956,000	$	2,391,000
Assets		3,000		56,000
Liabilities		752,000		276,000