STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-In Capital	Retained Earnings	Total
Beginning balance, shares at Aug. 31, 2016	17,225,478
Beginning balance, value at Aug. 31, 2016	$ 7,227	$ 11,376,007	$ 11,349,360	$ 22,732,594
Exercise of stock options, shares	49,642
Exercise of stock options, amount	$ 49	111,355		111,404
Stock-based compensation		585,018		585,018
Shares issued to Directors for services, shares	2,484
Shares issued to Directors for services, value	$ 2	36,761		36,763
Declaration of dividends			(3,448,489)	(3,448,489)
Net income			5,787,597	5,787,597
Ending balance, shares at Aug. 31, 2017	17,277,604
Ending balance, value at Aug. 31, 2017	$ 7,278	12,109,141	13,688,468	25,804,887
Exercise of stock options, shares	130,006
Exercise of stock options, amount	$ 131	635,452		635,583
Stock-based compensation		562,078		562,078
Shares issued to Directors for services, shares	8,835
Shares issued to Directors for services, value	$ 8	146,997		147,005
Declaration of dividends			(4,161,740)	(4,161,740)
Net income			8,934,812	8,934,812
Ending balance, shares at Aug. 31, 2018	17,416,445
Ending balance, value at Aug. 31, 2018	$ 7,417	13,453,668	18,461,540	31,922,625
Cumulative Effect of Changes related to adoption of ASC 606 at Aug. 31, 2019			(493,279)	(493,279)
Exercise of stock options, shares	166,703
Exercise of stock options, amount	$ 168	787,979		788,147
Stock-based compensation		865,848		865,848
Shares issued to Directors for services, shares	8,686
Shares issued to Directors for services, value	$ 10	211,979		211,989
Declaration of dividends	2		(4,197,055)	(4,197,055)
Net income			8,583,329	8,583,329
Ending balance, shares at Aug. 31, 2019	17,591,834
Ending balance, value at Aug. 31, 2019	$ 7,595	$ 15,319,474	$ 22,354,535	$ 37,681,604