Fair Value Measurements (Schedule of Financial Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Aug. 31, 2021	Aug. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 127,107	$ 121,403
Marketable securities:
Earn-out liability	(250)	(1,112)
Derivative assets		21
Corporate Bonds [Member]
Marketable securities:
Marketable securities	15,484	14,426
U.S. Treasury Securities [Member]
Marketable securities:
Marketable securities	4,120	5,085
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	127,107	121,403
Marketable securities:
Earn-out liability	0	0
Derivative assets		0
Level 1 [Member] | Corporate Bonds [Member]
Marketable securities:
Marketable securities	0	0
Level 1 [Member] | U.S. Treasury Securities [Member]
Marketable securities:
Marketable securities	0	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Marketable securities:
Earn-out liability	0	0
Derivative assets		21
Level 2 [Member] | Corporate Bonds [Member]
Marketable securities:
Marketable securities	15,484	14,426
Level 2 [Member] | U.S. Treasury Securities [Member]
Marketable securities:
Marketable securities	4,120	5,085
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0	0
Marketable securities:
Earn-out liability	(250)	(1,112)
Derivative assets		0
Level 3 [Member] | Corporate Bonds [Member]
Marketable securities:
Marketable securities	0	0
Level 3 [Member] | U.S. Treasury Securities [Member]
Marketable securities:
Marketable securities	$ 0	$ 0