CONDENSED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Feb. 28, 2022	$ 2,540,400	$ 12,246,600	$ 44,525,100	$ (12,546,600)		$ 46,765,500
Balance (in Shares) at Feb. 28, 2022	12,702,080			3,994,833
Sales of treasury stock		39,000		$ 24,400		63,400
Sales of treasury stock (in Shares)				(7,771)
Forfeiture of restricted shares				$ 0
Forfeiture of restricted shares (in Shares)				16,180
Share-based compensation expense - net		261,600				261,600
Net earnings (loss)			215,800			215,800
Balance at May. 31, 2022	$ 2,540,400	12,547,200	44,740,900	$ (12,522,200)		47,306,300
Balance (in Shares) at May. 31, 2022	12,702,080			4,003,242
Balance at Feb. 28, 2022	$ 2,540,400	12,246,600	44,525,100	$ (12,546,600)		46,765,500
Balance (in Shares) at Feb. 28, 2022	12,702,080			3,994,833
Change in fair value of interest rate derivatives						0
Net earnings (loss)						(586,100)
Balance at Aug. 31, 2022	$ 2,540,400	12,666,900	43,939,000	$ (12,522,200)		46,624,100
Balance (in Shares) at Aug. 31, 2022	12,702,080			4,016,791
Balance at May. 31, 2022	$ 2,540,400	12,547,200	44,740,900	$ (12,522,200)		47,306,300
Balance (in Shares) at May. 31, 2022	12,702,080			4,003,242
Forfeiture of restricted shares				$ 0
Forfeiture of restricted shares (in Shares)				13,549
Share-based compensation expense - net		119,700				119,700
Change in fair value of interest rate derivatives						0
Net earnings (loss)			(801,900)			(801,900)
Balance at Aug. 31, 2022	$ 2,540,400	12,666,900	43,939,000	$ (12,522,200)		46,624,100
Balance (in Shares) at Aug. 31, 2022	12,702,080			4,016,791
Balance at Feb. 28, 2023	$ 2,540,400	13,193,400	42,020,200	$ (12,522,200)		45,231,800
Balance (in Shares) at Feb. 28, 2023	12,702,080			3,988,791
Purchases of treasury stock				$ (563,900)		(563,900)
Purchases of treasury stock (in Shares)				138,201
Share-based compensation expense - net		96,200				96,200
Net earnings (loss)			(872,800)			(872,800)
Balance at May. 31, 2023	$ 2,540,400	13,289,600	41,147,400	$ (13,086,100)		43,891,300
Balance (in Shares) at May. 31, 2023	12,702,080			4,126,992
Balance at Feb. 28, 2023	$ 2,540,400	13,193,400	42,020,200	$ (12,522,200)		45,231,800
Balance (in Shares) at Feb. 28, 2023	12,702,080			3,988,791
Change in fair value of interest rate derivatives						51,100
Net earnings (loss)						188,900
Balance at Aug. 31, 2023	$ 2,540,400	13,369,200	42,209,100	$ (13,086,100)	$ 51,100	45,083,700
Balance (in Shares) at Aug. 31, 2023	12,702,080			4,130,992
Balance at May. 31, 2023	$ 2,540,400	13,289,600	41,147,400	$ (13,086,100)		43,891,300
Balance (in Shares) at May. 31, 2023	12,702,080			4,126,992
Forfeiture of restricted shares				$ 0
Forfeiture of restricted shares (in Shares)				4,000
Share-based compensation expense - net		79,600				79,600
Change in fair value of interest rate derivatives					51,100	51,100
Net earnings (loss)			1,061,700			1,061,700
Balance at Aug. 31, 2023	$ 2,540,400	$ 13,369,200	$ 42,209,100	$ (13,086,100)	$ 51,100	$ 45,083,700
Balance (in Shares) at Aug. 31, 2023	12,702,080			4,130,992