CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 31, 2018
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 739	$ 559
Property, plant and equipment, accumulated depreciation (in dollars)	49,730	49,212
Intangible assets, accumulated amortization (in dollars)	$ 65,862	$ 54,039
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	9,400,748	9,396,947
Common stock, shares outstanding	9,400,748	9,396,947