3. Impact of the COVID-19 Pandemic (Details) - USD ($)									6 Months Ended
	May 27, 2021	Apr. 29, 2021	Apr. 26, 2021	Apr. 16, 2021	Mar. 08, 2021	Mar. 05, 2021	Feb. 12, 2021	Jul. 31, 2020	Apr. 30, 2021
Payroll Taxes Subject To Deferred Payment Under The Cares Act									$ 139,000
CARES Act Payroll Support Program
Proceeds from Loans	$ 655,000	$ 655,000	$ 655,000	$ 1,310,000	$ 655,000	$ 1,310,000	$ 875,000	$ 3,003,000
CARES Act Payroll Support Program 3
Proceeds from Loans	$ 655,000	$ 655,000		$ 1,310,000