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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment | Total AOS Shareholders' Equity | Total AOS Shareholders' Equity Cumulative Effect, Period of Adoption, Adjustment | Convertible Preferred Shares [Member] | Common Shares [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income [Member] | Retained Earnings [Member] | Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment | Noncontrolling Interest
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Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Balance, Including Portion Attributable to Noncontrolling Interest | $ 298,549 |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2017 |  |  |  |  | 0 |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2017 |  |  |  |  |  | 29,600,000 |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2017 |  |  |  |  |  |  | (5,608,000) |  |  |  |  |
Balance at Jun. 30, 2017 |  | $ (5,480) | $ 270,770 | $ (5,480) | $ 0 | $ 59 | $ (49,836) | $ 206,332 | $ 306 | $ 113,909 | $ (5,480) | $ 27,779
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Exercise of common stock options and release of RSUs (in shares) |  |  |  |  |  | 645,000 |  |  |  |  |  |
Exercise of common stock options and release of RSUs | 1,544 |  | 1,544 |  |  | $ 1 |  | 1,543 |  |  |  |
Reissuance of Treasury Stock (in shares) |  |  |  |  |  |  | 18,000 |  |  |  |  |
Reissuance of Treasury Stock | 91 |  | 91 |  |  |  | $ 144 |  |  | (53) |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  | (145,000) |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation | (2,363) |  | (2,363) |  |  |  |  | (2,363) |  |  |  |
Issuance of common shares under Employee Stock Purchase Plan (in shares) |  |  |  |  |  | 300,000 |  |  |  |  |  |
Issuance of common shares under Employee Stock Purchase Plan | $ 3,321 |  | 3,321 |  |  | $ 1 |  | 3,320 |  |  |  |
Repurchase of common shares under shares repurchase program (in shares) | (950,046) |  |  |  |  |  | (950,000) |  |  |  |  |
Repurchase of common shares under shares repurchase program | $ (15,098) |  | (15,098) |  |  |  | $ (15,098) |  |  |  |  |
Share-based compensation expense | 11,412 |  | 11,412 |  |  |  |  | 11,412 |  |  |  |
Net income (loss) attributable to AOS | 14,263 |  | 14,263 |  |  |  |  |  |  | 14,263 |  |
Cumulative translation adjustment |  |  | 134 |  |  |  |  |  | 134 |  |  |
Net loss attributable to noncontrolling interest | (9,315) |  |  |  |  |  |  |  |  |  |  | (9,315)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | 110
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax | 244 |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Increase from Subsidiary Equity Issuance | 128,994 |  |  |  |  |  |  |  |  |  |  | 128,994
Net income (loss) including noncontrolling interest | 4,948 |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2018 |  |  |  |  | 0 |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2018 |  |  |  |  |  | 30,400,000 |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2018 |  |  |  |  |  |  | (6,540,000) |  |  |  |  |
Balance at Jun. 30, 2018 |  | $ 1,036 | 278,594 | $ 1,036 | $ 0 | $ 61 | $ (64,790) | 220,244 | 440 | 122,639 | $ 1,036 | 147,568
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Balance, Including Portion Attributable to Noncontrolling Interest | 426,162 |  |  |  |  |  |  |  |  |  |  |
Exercise of common stock options and release of RSUs (in shares) |  |  |  |  |  | 616,000 |  |  |  |  |  |
Exercise of common stock options and release of RSUs | 110 |  | 110 |  |  | $ 1 |  | 109 |  |  |  |
Reissuance of Treasury Stock (in shares) |  |  |  |  |  |  | 6,000 |  |  |  |  |
Reissuance of Treasury Stock | 0 |  | 0 |  |  |  | $ 51 |  |  | (51) |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  | (182,000) |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation | (2,028) |  | (2,028) |  |  |  |  | (2,028) |  |  |  |
Issuance of common shares under Employee Stock Purchase Plan (in shares) |  |  |  |  |  | 329,000 |  |  |  |  |  |
Issuance of common shares under Employee Stock Purchase Plan | $ 2,908 |  | 2,908 |  |  | $ 0 |  | 2,908 |  |  |  |
Repurchase of common shares under shares repurchase program (in shares) | (111,509) |  |  |  |  |  | (112,000) |  |  |  |  |
Repurchase of common shares under shares repurchase program | $ (1,501) |  | (1,501) |  |  |  | $ (1,501) |  |  |  |  |
Share-based compensation expense | 13,177 |  | 13,177 |  |  |  |  | 13,177 |  |  |  |
Net income (loss) attributable to AOS | 1,861 |  | 1,861 |  |  |  |  |  |  | 1,861 |  |
Cumulative translation adjustment |  |  | (3,133) |  |  |  |  |  | (3,133) |  |  |
Net loss attributable to noncontrolling interest | (16,499) |  |  |  |  |  |  |  |  |  |  | (16,499)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | (2,804)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax | (5,937) |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Increase from Subsidiary Equity Issuance | 24,000 |  |  |  |  |  |  |  |  |  |  | 24,000
Net income (loss) including noncontrolling interest | $ (14,638) |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2019 | 0 |  |  |  | 0 |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2019 | 31,163,000 |  |  |  |  | 31,163,000 |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2019 | (6,646,000) |  |  |  |  |  | (6,646,000) |  |  |  |  |
Balance at Jun. 30, 2019 | $ 291,024 |  | 291,024 |  | $ 0 | $ 62 | $ (66,240) | 234,410 | (2,693) | 125,485 |  | 152,265
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Balance, Including Portion Attributable to Noncontrolling Interest | 443,289 |  |  |  |  |  |  |  |  |  |  |
Exercise of common stock options and release of RSUs (in shares) |  |  |  |  |  | 562,000 |  |  |  |  |  |
Exercise of common stock options and release of RSUs | 25 |  | 25 |  |  | $ 1 |  | 24 |  |  |  |
Reissuance of Treasury Stock (in shares) |  |  |  |  |  |  | 7,000 |  |  |  |  |
Reissuance of Treasury Stock | 0 |  | 0 |  |  |  | $ 56 |  |  | (56) |  |
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation |  |  |  |  |  | (181,000) |  |  |  |  |  |
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation | (1,509) |  | (1,509) |  |  |  |  | (1,509) |  |  |  |
Issuance of common shares under Employee Stock Purchase Plan (in shares) |  |  |  |  |  | 400,000 |  |  |  |  |  |
Issuance of common shares under Employee Stock Purchase Plan | $ 3,325 |  | 3,325 |  |  | $ 1 |  | 3,324 |  |  |  |
Repurchase of common shares under shares repurchase program (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense | $ 9,854 |  | 9,854 |  |  |  |  | 9,854 |  |  |  |
Net income (loss) attributable to AOS | (6,596) |  | (6,596) |  |  |  |  |  |  | (6,596) |  |
Cumulative translation adjustment |  |  | (2,434) |  |  |  |  |  | (2,434) |  |  |
Net loss attributable to noncontrolling interest | (11,661) |  |  |  |  |  |  |  |  |  |  | (11,661)
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  |  | (2,405)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax | (4,839) |  |  |  |  |  |  |  |  |  |  |
Net income (loss) including noncontrolling interest | $ (18,257) |  |  |  |  |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2020 | 0 |  |  |  | 0 |  |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2020 | 31,944,000 |  |  |  |  | 31,944,000 |  |  |  |  |  |
Balance (in shares) at Jun. 30, 2020 | (6,639,000) |  |  |  |  |  | (6,639,000) |  |  |  |  |
Balance at Jun. 30, 2020 | $ 293,689 |  | $ 293,689 |  | $ 0 | $ 64 | $ (66,184) | $ 246,103 | $ (5,127) | $ 118,833 |  | $ 138,199
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |
Stockholders' Equity Balance, Including Portion Attributable to Noncontrolling Interest | $ 431,888 |  |  |  |  |  |  |  |  |  |  |

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