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Acquisitions and Investments - Investments (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
May 06, 2013 USD ($) | Aug. 31, 2018 USD ($) | Jan. 31, 2011 USD ($) | Jun. 30, 2018 USD ($)
Investments |  |  |  |
Investment |  | $ 6,700 |  |
Ownership percentage |  | 39.50% |  |
Convertible note |  | $ 5,000 |  |
Ownership percentage on an if-converted basis |  | 56.00% |  |
Term of debt |  | 48 months |  |
Investment reclassified | $ 10,000 |  |  |
Series D Preferred shares |  |  |  |
Investments |  |  |  |
Convertible into Series D Preferred shares |  | 3,670 |  |
Base Rate |  |  |  |
Investments |  |  |  |
Interest rate spread added to base rate (as a percent) |  | 25.00% |  |
Web International Education Group, Ltd. (Web) |  |  |  |
Investments |  |  |  |
Ownership percentage |  |  | 20.00% |
Convertible note |  |  | $ 10,000 |
Web International Education Group, Ltd. (Web) | Other current assets |  |  |  |
Investments |  |  |  |
Investment reclassified | $ 10,000 |  |  | $ 10,000

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