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CONDENSED CONSOLIDATED STATEMENTS OF REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’ EQUITY - 9 months ended Jun. 30, 2018 - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Treasury Stock | Accumulated Deficit | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | --- | ---
Redeemable Convertible Preferred Stock, beginning balance (in shares) at Sep. 30, 2017 | 32,482,590 |  |  |  |  |
Redeemable Convertible Preferred Stock, beginning balance at Sep. 30, 2017 | $ 90,341 |  |  |  |  |
Redeemable Convertible Preferred Stock, ending balance (in shares) at Jun. 30, 2018 | 32,482,590 |  |  |  |  |
Redeemable Convertible Preferred Stock, ending balance at Jun. 30, 2018 | $ 90,341 |  |  |  |  |
Balances, beginning of period at Sep. 30, 2017 |  | 59,339,336 |  | (746,462) |  |
Balances, beginning of period (in shares) at Sep. 30, 2017 | $ 27 | $ 59 | $ 200,301 | $ (10,161) | $ (188,007) | $ (2,165)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Exercise of stock options (in shares) | 1,735,750 | 1,735,750 |  |  |  |
Exercise of stock options | $ 5,748 | $ 2 | 5,746 |  |  |
Repurchase of common stock (in shares) |  |  |  | (60,578) |  |
Repurchase of common stock | (911) |  |  | $ (911) |  |
Stock-based compensation expense | 29,397 |  | 29,397 |  |  |
Net income (loss) | (13,884) |  |  |  | (13,884) |
Change in foreign currency translation adjustment | 523 |  |  |  |  | 523
Balances, ending of period at Jun. 30, 2018 |  | 61,075,086 |  | (807,040) |  |
Balances, ending of period (in shares) at Jun. 30, 2018 | $ 20,900 | $ 61 | $ 235,444 | $ (11,072) | $ (201,891) | $ (1,642)

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