| Activity In Allowance For Doubtful Accounts |
| | | | | | | | Balance at August 31, 2020 | | $ | 4,159 | Charged to costs and expenses | | | 247 | Amounts written off | | | (655) | Balance at November 30, 2020 | | | 3,751 | Charged to costs and expenses | | | 46 | Amounts written off | | | (135) | Balance at February 28, 2021 | | | 3,662 | Charged to costs and expenses | | | 1,066 | Amounts written off | | | (185) | Balance at May 31, 2021 | | $ | 4,543 |
|