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

9 Months Ended

Aug. 31, 2020

Notes Tables

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

	August 31, 2020		November 30, 2019
Receivables	$	1,766,000	$	1,703,000
Assets	$	122,000	$	727,000
Liabilities	$	454,000	$	89,000