Note 9 - Stockholders' Equity - Cash Dividends Declared (Details) - $ / shares	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024
Amount, per share (in dollars per share)	$ 0.16	$ 0.28
O 2025 Q1 Dividends [Member]
Declaration date	Oct. 16, 2024
Amount, per share (in dollars per share)	$ 0.07
Record date	Oct. 30, 2024
Payable date	Nov. 13, 2024
Declaration date	Oct. 16, 2024
O 2024 Q1 Dividends [Member]
Declaration date		Oct. 18, 2023
Amount, per share (in dollars per share)		$ 0.07
Record date		Nov. 01, 2023
Payable date		Nov. 15, 2023
Declaration date		Oct. 18, 2023
O, 2024, Q2, Dividends [Member]
Declaration date		Jan. 17, 2024
Amount, per share (in dollars per share)		$ 0.07
Record date		Jan. 31, 2024
Payable date		Feb. 14, 2024
Declaration date		Jan. 17, 2024
O 2025 Q2 Dividends [Member]
Declaration date	Jan. 15, 2025
Amount, per share (in dollars per share)	$ 0.07
Record date	Jan. 29, 2025
Payable date	Feb. 12, 2025
Declaration date	Jan. 15, 2025
O, 2024, Q3, Dividends [Member]
Declaration date		Apr. 17, 2024
Amount, per share (in dollars per share)		$ 0.07
Record date		May 01, 2024
Payable date		May 15, 2024
Declaration date		Apr. 17, 2024
O, 2024, Q4, Dividends [Member]
Declaration date		Jul. 17, 2024
Amount, per share (in dollars per share)		$ 0.07
Record date		Jul. 31, 2024
Payable date		Aug. 14, 2024
Declaration date		Jul. 17, 2024
O 2025 Q3 Dividends [Member]
Declaration date	Apr. 16, 2025
Amount, per share (in dollars per share)	$ 0.01
Record date	Apr. 30, 2025
Payable date	May 14, 2025
Declaration date	Apr. 16, 2025
O 2025 Q4 Dividends [Member]
Declaration date	Jul. 16, 2025
Amount, per share (in dollars per share)	$ 0.01
Record date	Jul. 30, 2025
Payable date	Aug. 13, 2025
Declaration date	Jul. 16, 2025