CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock and additional paid in capital	Retained earnings	Accumulated other comprehensive (loss) income
Balance, beginning of period at Aug. 31, 2021		$ 133,418	$ 32,407	$ (43)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		541
Stock-based compensation		1,337
Shares issued to Directors for services		176
Repurchase and retirement of common shares		0	0
Declaration of dividends			(2,420)
Net income	$ 7,435		7,435
Other comprehensive (loss) income				(275)
Balance, end of period at Feb. 28, 2022	$ 172,576	135,472	37,422	(318)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in usd per share)	$ 0.12
Balance, beginning of period at Nov. 30, 2021		134,512	34,224	(280)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		169
Stock-based compensation		703
Shares issued to Directors for services		88
Repurchase and retirement of common shares		0	0
Declaration of dividends			(1,211)
Net income	$ 4,409		4,409
Other comprehensive (loss) income				(38)
Balance, end of period at Feb. 28, 2022	$ 172,576	135,472	37,422	(318)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in usd per share)	$ 0.06
Balance, beginning of period at Aug. 31, 2022	$ 178,248	138,512	40,044	(308)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		963
Stock-based compensation		2,046
Shares issued to Directors for services		300
Repurchase and retirement of common shares		(4,000)	(16,000)
Declaration of dividends			(2,413)
Net income	5,419		5,419
Other comprehensive (loss) income				30
Balance, end of period at Feb. 28, 2023	$ 164,593	137,821	27,050	(278)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in usd per share)	$ 0.12
Balance, beginning of period at Nov. 30, 2022		140,306	40,071	(255)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options		205
Stock-based compensation		1,160
Shares issued to Directors for services		150
Repurchase and retirement of common shares		(4,000)	(16,000)
Declaration of dividends			(1,195)
Net income	$ 4,174		4,174
Other comprehensive (loss) income				(23)
Balance, end of period at Feb. 28, 2023	$ 164,593	$ 137,821	$ 27,050	$ (278)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividends declared per common share (in usd per share)	$ 0.06