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Fair Value Measurements (Details) € in Thousands, $ in Thousands	Aug. 31, 2022 USD ($)	Aug. 31, 2021 USD ($)	Sep. 01, 2020 USD ($)	Sep. 01, 2020 EUR (€)
Fair value measurements
Long term debt outstanding	$ 180,000
ABchime
Fair value measurements
Contingent consideration	2,584		$ 928	€ 780
Recurring basis
Fair value measurements
Restricted investments	2,367	$ 2,260
Long-term debt	$ 180,000	0
Long-term debt applicable interest rate	5.50%
Contingent consideration	$ 2,584	2,537
Recurring basis \| Quoted prices in active markets (Level 1)
Fair value measurements
Restricted investments	2,125	2,016
Recurring basis \| Significant other observable inputs (Level 2)
Fair value measurements
Restricted investments	242	244
Long-term debt	180,000
Recurring basis \| Significant unobservable inputs (Level 3)
Fair value measurements
Contingent consideration	$ 2,584	$ 2,537