CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2017	Aug. 31, 2016
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 456	$ 830
Property, plant and equipment, accumulated depreciation (in dollars)	44,277	41,409
Intangible assets, accumulated amortization (in dollars)	$ 42,206	$ 33,352
First Serial Preferred Stock, par value (in dollars per share)	$ 1.00	$ 1.00
First Serial Preferred Stock, Authorized shares	100,000	100,000
First Serial Preferred Stock, issued shares	0	0
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, Authorized shares	20,000,000	20,000,000
Common stock, shares issued	9,354,136	9,278,486
Common stock, shares outstanding	9,354,136	9,278,486