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Summary of Significant Accounting Policies - Concentration Risk and Inventories (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Concentration of revenues |  |  |
Accounts receivable | $ 236,134 | $ 191,639 |
Deposits and other assets | 71,824 | 48,330 |
Current and long-term balance | 18,600 |  |
Inventories |  |  |
Inventory deemed long-term and included in deposits and other assets | 5,200 | 4,100 |
Increase (decrease) in provision for excess and obsolete inventory | 700 | 600 | $ 1,200
Excess and obsolete inventory reserve | $ 4,800 | $ 4,100 |
Revenue | Customer Concentration Risk |  |  |
Concentration of revenues |  |  |
Concentration risk (as a percent) | 10.00% | 10.00% | 10.00%
Revenue | Customer Concentration Risk | Managed Schools |  |  |
Concentration of revenues |  |  |
Concentration risk (as a percent) | 88.00% | 88.00% | 85.00%
Number of customers with concentration | 0 | 1 | 0
Agora |  |  |
Concentration of revenues |  |  |
Accounts receivable |  |  | $ 28,700
Settlement repayment period |  |  | 4 years
Deposits and other assets |  |  | $ 23,200

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