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Joint Venture - Changes in Total Stockholders' Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 95 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018
Schedule of Equity Method Investments [Line Items] |  |  |
Balance, June 30, 2018 | $ 426,162 |  |
Exercise of common stock options and release of RSUs | 105 |  |
Withholding tax on restricted stock units | (109) |  |
Repurchase of common shares under shares repurchase program | (1,501) |  | $ (67,300)
Stock-based compensation expense | 3,129 |  |
Net income (loss) | (913) | $ 3,339 |
Net loss attributable to noncontrolling interest | (3,329) | $ (1,461) |
Cumulative translation adjustment | (6,237) |  |
Balance, September 30, 2018 | 421,672 |  | 421,672
Accounting Standards Update 2016-16 |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Impact on retained earnings related to ASC 606 adoption | 1,036 |  |
Parent |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Balance, June 30, 2018 | 278,594 |  |
Exercise of common stock options and release of RSUs | 105 |  |
Withholding tax on restricted stock units | (109) |  |
Repurchase of common shares under shares repurchase program | (1,501) |  |
Stock-based compensation expense | 3,129 |  |
Net income (loss) | 2,416 |  |
Cumulative translation adjustment | (3,248) |  |
Balance, September 30, 2018 | 280,422 |  | 280,422
Parent | Accounting Standards Update 2016-16 |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Impact on retained earnings related to ASC 606 adoption | 1,036 |  |
Noncontrolling Interest |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Balance, June 30, 2018 | 147,568 |  |
Exercise of common stock options and release of RSUs | 0 |  |
Withholding tax on restricted stock units | 0 |  |
Repurchase of common shares under shares repurchase program | 0 |  |
Stock-based compensation expense | 0 |  |
Net loss attributable to noncontrolling interest | (3,329) |  |
Cumulative translation adjustment | (2,989) |  |
Balance, September 30, 2018 | 141,250 |  | $ 141,250
Noncontrolling Interest | Accounting Standards Update 2016-16 |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Impact on retained earnings related to ASC 606 adoption | $ 0 |  |

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