CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2017	Feb. 29, 2016
Revenue
Sales	$ 56,288	$ 53,706	$ 116,557	$ 110,452
Royalties and commissions	1,020	1,218	2,108	1,950
Total revenues	57,308	54,924	118,665	112,402
Costs and Expenses
Cost of products and services sold	32,858	34,895	68,147	69,612
Selling, general and administrative expenses	11,518	10,226	23,270	21,736
Exit costs related to idle facility (Note 15)	23	209	50	209
Acquisition related costs (Note 14)			584
Write-down of certain assets under construction (Note 8)				365
Operating income	12,909	9,594	26,614	20,480
Interest expense	(307)	(260)	(553)	(510)
Gain on sale of location (Note 9)	68		860
Gain on sale of business (Note 8)				(1,031)
Other income (expense)	(27)	1,419	372	1,388
Income before income taxes	12,643	10,753	27,293	22,389
Income taxes	4,260	3,781	8,547	7,968
Net income	$ 8,383	$ 6,972	$ 18,746	$ 14,421
Net income available to common shareholders, per common and common equivalent share
Basic (in dollars per share)	$ 0.90	$ 0.75	$ 2.01	$ 1.56
Diluted (in dollars per share)	$ 0.89	$ 0.74	$ 1.99	$ 1.54
Weighted average shares outstanding
Basic (in shares)	9,246,021	9,155,365	9,237,129	9,148,493
Diluted (in shares)	9,360,398	9,292,224	9,336,379	9,287,486
Cash dividends paid per share (in dollars per share)			$ 0.70	$ 0.65