CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2017	May 31, 2016
Revenue
Sales	$ 63,641	$ 63,480	$ 180,198	$ 173,932
Royalties and commissions	1,260	756	3,368	2,706
Total revenues	64,901	64,236	183,566	176,638
Costs and Expenses
Cost of products and services sold	37,511	38,542	105,658	108,154
Selling, general and administrative expenses	12,297	11,770	35,567	33,506
Exit costs related to idle facility (Note 15)		662	50	871
Acquisition related costs (Note 14)			584
Write-down of certain assets under construction (Note 8)				365
Operating income	15,093	13,262	41,707	33,742
Interest expense	(158)	(284)	(711)	(794)
Gain on sale of real estate (Note 9)			860
Gain on sale of business (Note 8)	(2,013)		(2,013)	(1,031)
Other income (expense)	164	(512)	536	876
Income before income taxes	17,112	12,466	44,405	34,855
Income taxes	5,257	4,935	13,804	12,903
Net income	$ 11,855	$ 7,531	$ 30,601	$ 21,952
Net income available to common shareholders, per common and common equivalent share
Basic (in dollars per share)	$ 1.27	$ 0.81	$ 3.27	$ 2.38
Diluted (in dollars per share)	$ 1.26	$ 0.80	$ 3.24	$ 2.34
Weighted average shares outstanding
Basic (in shares)	9,258,219	9,173,252	9,244,237	9,156,805
Diluted (in shares)	9,336,725	9,311,798	9,331,470	9,287,809
Cash dividends paid per share (in dollars per share)			$ 0.70	$ 0.65