Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 0	$ 0
Common Stock, par value	$ 0.1	$ 0.1
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