CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($)	Common Stock	Additional Paid-In Capital	Retained Earnings	Total
Beginning balance, shares at Aug. 31, 2018	17,416,445
Beginning 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 Nov. 30, 2018			(493,279)	(493,279)
Exercise of stock options, shares	41,103
Exercise of stock options, amount	$ 42	357,410		357,452
Stock-based compensation		200,029		200,029
Shares issued to Directors for services, shares	2,222
Shares issued to Directors for services, value	$ 2	44,904		44,906
Declaration of dividends			(1,045,073)	(1,045,073)
Net income			1,535,947	1,535,947
Ending balance, shares at Nov. 30, 2018	17,459,770
Ending balance, value at Nov. 30, 2018	$ 7,461	14,056,011	18,459,135	32,522,607
Exercise of stock options, shares	37,680
Exercise of stock options, amount	$ 38	121,912		121,950
Stock-based compensation		208,715		208,715
Shares issued to Directors for services, shares	2,508
Shares issued to Directors for services, value	$ 4	48,954		48,958
Declaration of dividends			(1,048,887)	(1,048,887)
Net income			2,099,449	2,099,449
Ending balance, shares at Feb. 28, 2019	17,499,958
Ending balance, value at Feb. 28, 2019	$ 7,503	14,435,592	19,509,697	33,952,792
Exercise of stock options, shares	25,849
Exercise of stock options, amount	$ 26	103,747		103,773
Stock-based compensation		224,654		224,654
Shares issued to Directors for services, shares	2,176
Shares issued to Directors for services, value	$ 2	49,023		49,025
Declaration of dividends			(1,050,914)	(1,050,914)
Net income			2,888,706	2,888,706
Ending balance, shares at May. 31, 2019	17,527,983
Ending balance, value at May. 31, 2019	$ 7,531	14,813,016	21,347,489	36,168,036
Exercise of stock options, shares	62,071
Exercise of stock options, amount	$ 62	204,910		204,972
Stock-based compensation		232,450		232,450
Shares issued to Directors for services, shares	1,780
Shares issued to Directors for services, value	$ 2	69,098		69,100
Declaration of dividends			(1,052,181)	(1,052,181)
Net income			2,059,227	2,059,227
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
Exercise of stock options, shares	29,445
Exercise of stock options, amount	$ 29	135,529		135,558
Stock-based compensation		294,704		294,704
Shares issued to Directors for services, shares	2,045
Shares issued to Directors for services, value	$ 2	72,411		72,413
Declaration of dividends			(1,056,379)	(1,056,379)
Net income			2,058,277	2,058,277
Ending balance, shares at Nov. 30, 2019	17,623,324
Ending balance, value at Nov. 30, 2019	$ 7,626	$ 15,822,118	$ 23,356,433	$ 39,186,177