Condensed Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Feb. 26, 2022	Nov. 30, 2021
Statement of Financial Position [Abstract]
Accounts Receivable, Allowance for Credit Loss, Current	$ 0	$ 0
Common Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Common Stock, Shares Authorized	10,000,000	10,000,000
Common Stock, Shares, Issued	3,078,315	3,078,315
Common Stock, Shares, Outstanding	2,578,315	2,578,315
Treasury Stock, Shares	500,000	500,000