CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Common Stock And Additional Paid In Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance, beginning of period at Aug. 31, 2020	$ 128,541	$ 27,436	$ 58
Exercise of stock options	836
Stock-based compensation	1,166
Shares issued to Directors for services	170
Declaration of dividend		(2,396)
Net income		5,690		$ 5,690
Other comprehensive income			(4)
Common dividends declared per common share				$ 0.12
Balance, end of period at Feb. 28, 2021	130,713	30,730	54	$ 161,497
Balance, beginning of period at Nov. 30, 2020	129,253	28,720	58
Exercise of stock options	656
Stock-based compensation	717
Shares issued to Directors for services	87
Declaration of dividend		(1,201)
Net income		3,211		$ 3,211
Other comprehensive income			(4)
Common dividends declared per common share				$ 0.06
Balance, end of period at Feb. 28, 2021	130,713	30,730	54	$ 161,497
Balance, beginning of period at Aug. 31, 2021	133,418	32,407	(43)	165,782
Exercise of stock options	541
Stock-based compensation	1,337
Shares issued to Directors for services	176
Declaration of dividend		(2,420)
Net income		7,435		$ 7,435
Other comprehensive income			(275)
Common dividends declared per common share				$ 0.12
Balance, end of period at Feb. 28, 2022	135,472	37,422	(318)	$ 172,576
Balance, beginning of period at Nov. 30, 2021	134,512	34,224	(280)
Exercise of stock options	169
Stock-based compensation	703
Shares issued to Directors for services	88
Declaration of dividend		(1,211)
Net income		4,409		$ 4,409
Other comprehensive income			(38)
Common dividends declared per common share				$ 0.06
Balance, end of period at Feb. 28, 2022	$ 135,472	$ 37,422	$ (318)	$ 172,576