Summary of Significant Accounting Policies (Details)		12 Months Ended
	Aug. 24, 2020 $ / shares shares	Nov. 30, 2020 USD ($) derivative lease tenant $ / shares	Nov. 30, 2019 USD ($) $ / shares	Dec. 01, 2019 USD ($)
Fiscal Year
Length of fiscal year		12 months
Transition period		1 month
Cash and Cash Equivalents
Cash equivalents		$ 27,062,000	$ 4,299,000
Revenue and Gain Recognition
Adjustment to rental revenue		$ 26,000
Number of tenant account | tenant		1
Allowance for uncollectible accounts or bad debt expenses			$ 0
Income Taxes
Accrual for uncertain income tax positions		$ 0
Financial Instruments
Common stock, par value (in dollars per share) | $ / shares		$ 0.01	$ 0.01
Recent Adopted Accounting Pronouncements
Number of operating leases | lease		2
Right-of-use assets		$ 716,000		$ 858,000
Lease liabilities		$ 748,000		$ 858,000
Operating Lease, Liability, Statement of Financial Position [Extensible List]		Lease liabilities		Other Liabilities.
Interest rate swap agreement
Interest Rate Swap Agreements
Number of Interest Rate Derivatives Held | derivative		13
Securities Purchase Agreement
Financial Instruments
Sale of common stock | shares	504,590
Common stock, par value (in dollars per share) | $ / shares	$ 0.01