CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2018
Cash flows from operating activities
Net income	$ 9,332,060	$ 8,583,329	$ 8,934,812
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	2,961,930	2,750,245	2,721,304
Change in value of contingent consideration	202,500	109,060	152,752
Stock-based compensation	1,576,525	1,077,837	709,083
Deferred income taxes	(377,759)	(299,096)	(1,731,821)
Increase (decrease) in
Accounts receivable	(2,017,792)	487,970	(1,465,803)
Revenues in excess of billings	140,316	(1,248,063)	(504,514)
Prepaid income taxes	(12,380)	(452,517)	149,850
Prepaid expenses and other assets	(398,213)	(93,877)	(153,682)
Accounts payable	220,584	(147,529)	110,713
Accrued payroll and other expenses	23,030	486,862	168,883
Billings in excess of revenues	(657,558)	413,946	167,645
Accrued income taxes	0	0	0
Deferred revenue	(81,305)	(29,747)	27,966
Net cash provided by operating activities	10,911,938	11,638,420	9,287,188
Cash flows used in investing activities
Purchases of property and equipment	(231,380)	(137,745)	(183,291)
Purchases of intellectual property	0	(50,000)	0
Purchase of short-term investments	(67,248,924)	0	0
Cash used to acquire subsidiaries	(9,471,352)	0	0
Cash received in acquisition	3,799,134	0	0
Capitalized computer software development costs	(2,353,188)	(1,767,996)	(2,145,429)
Net cash used in investing activities	(75,505,710)	(1,955,741)	(2,328,720)
Cash flows provided by (used in) financing activities
Payment of dividends	(4,250,470)	(4,197,055)	(4,161,740)
Payments on contracts payable	(1,761,028)	(4,238,973)	(247,328)
Proceeds from the exercise of stock options	629,747	788,147	635,583
Proceeds from follow-on public offering, net	107,747,338	0	0
Net cash provided by (used in) financing activities	102,365,587	(7,647,881)	(3,773,485)
Net increase in cash and cash equivalents	37,771,815	2,034,798	3,184,983
Cash and cash equivalents, beginning of year	11,435,499	9,400,701	6,215,718
Cash and cash equivalents, end of period	49,207,314	11,435,499	9,400,701
Supplemental disclosures of cash flow information
Income taxes paid	2,352,770	2,673,475	2,712,988
Non-Cash Investing and Financing Activities
Stock issued for acquisition of Lixoft	3,260,674	0	0
Creation of contract liabilities for acquisition of subsidiaries	4,528,000	0	0
Right of use assets capitalized	$ 1,498,542	$ 0	$ 0