Income Taxes	9 Months Ended
Income Taxes	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company recognized income tax expense of approximately $1.0 million and income tax benefit of approximately $1.0 million for the three months ended March 31, 2021 and 2020, respectively. The income tax expense of $1.0 million for the three months ended March 31, 2021 included immaterial discrete tax. The income tax benefit of $1.0 million for the three months ended March 31, 2020 included a $1.3 million discrete tax benefit, $1.1 million related to re-measuring the tax benefit of net operating losses that can be carried back to prior years following the passage of the U.S. CARES Act, and $0.2 million related primarily to a prior year reserve release. Excluding the discrete income tax items, the effective tax rate for the three months ended March 31, 2021 and 2020 was 6.3% and (2.3)%, respectively. The changes in the effective tax rate and tax expense between the periods resulted primarily from the Company reporting pretax book income of $16.0 million for the three months ended March 31, 2021 as compared to a pretax book loss of $10.9 million for the three months ended March 31, 2020. The Company recognized income tax expense of approximately $2.7 million and income tax benefit of approximately $0.04 million for the nine months ended March 31, 2021 and 2020, respectively. The income tax expense of $2.7 million for the nine months ended March 31, 2021 included a $0.04 million discrete tax benefit. The income tax benefit of $0.04 million for the nine months ended March 31, 2020 included a $1.30 million discrete tax benefit, $1.1 million of which related to remeasuring the tax benefit of net operating losses that can be carried back to prior years following the passage of the U.S. CARES Act, and $0.2 million of which related to a prior year reserve release. Excluding the discrete income tax items, the effective tax rate for the nine months ended March 31, 2021 and 2020 was 7.0% and (7.4)%, respectively. The changes in the effective tax rate and tax expense between the periods resulted primarily from the Company reporting pretax book income of $39.0 million for the nine months ended March 31, 2021 as compared to a pretax book loss of $16.4 million for the nine months ended March 31, 2020. The Company files its income tax returns in the United States and in various foreign jurisdictions. The tax years 2001 to 2020 remain open to examination by U.S. federal and state tax authorities. The tax years 2013 to 2020 remain open to examination by foreign tax authorities. The Company's income tax returns are subject to examinations by the Internal Revenue Service and other tax authorities in various jurisdictions. In accordance with the guidance on the accounting for uncertainty in income taxes, the Company regularly assesses the likelihood of adverse outcomes resulting from these examinations to determine the adequacy of its provision for income taxes. These assessments can require considerable estimates and judgments. As of March 31, 2021, the gross amount of unrecognized tax benefits was approximately $7.2 million, of which $4.3 million, if recognized, would reduce the effective income tax rate in future periods. If the Company's estimate of income tax liabilities proves to be less than the ultimate assessment, then a further charge to expense would be required. If events occur and the payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities would result in tax benefits being recognized in the period when the Company determines the liabilities are no longer necessary. The Company does not anticipate any material changes to its uncertain tax positions during the next twelve months. "U.S. Coronavirus Aid, Relief and Economic Security Act” (“CARES Act”), Enacted March 27, 2020 On March 27, 2020, the United States enacted the Coronavirus Aid, Relief and Economic Security Act (“the CARES Act”), which made the changes to existing U.S. tax laws, including, but not limited to, (1) allowing U.S. federal net operating losses originated in the 2018, 2019 or 2020 tax years to be carried back five years to recover taxes paid based upon taxable income in the prior five years, (2) eliminating the 80% of taxable income limitation on net operating losses for the 2018, 2019 and 2020 tax years (the 80% limitation will be reinstated for tax years after 2020), (3) accelerating the refund of prior year alternative minimum tax credits, (4) modifying the bonus depreciation for qualified improvement property and (5) modifying the limitation on deductible interest expense. As a result of the ability to carryback net operating losses from the June 2018 and June 2019 years to the June 2015 to June 2017 tax years, net operating losses which were previously tax-effected using the current 21% U.S. federal tax rate were revalued to the U.S. tax rates in effect for the June 2015 to June 2017 tax years due to the ability of receiving tax refunds for the taxes paid in these years. Accordingly, the Company reported a discrete tax benefit of $1.1 million in the quarter ended March 31, 2020 related to the re-measurement of the net operating losses that could be realized via the new net operating loss carryback provisions. “U.S. Consolidated Appropriations Act, 2021” (“CAA 2021”), Enacted December 27, 2020 On December 27, 2020, the United States enacted the Consolidated Appropriations Act, 2021, which made changes to existing U.S. tax laws. There was no material impact of the tax law changes included in the Consolidated Appropriations Act, 2021 to the Company. “The American Rescue Plan Act of 2021”, Enacted March 11, 2021 On March 11, 2021, the United States enacted the American Rescue Plan Act of 2021, which made changes to existing U.S. tax laws. There was no material impact of the tax law changes included in the American Rescue Plan Act of 2021 to the Company. On July 27, 2015, in Altera Corp. v. Commissioner, the U.S. Tax Court issued an opinion related to the treatment of stock-based compensation expense in an intercompany cost-sharing arrangement. In the July 2015 ruling, the Tax Court concluded that the sharing of the cost of employee stock compensation in a company’s cost-sharing arrangement was invalid under the U.S. Administrative Procedures Act. In June 2019, a panel of the Ninth Circuit of the U.S. Court of Appeals reversed this decision. In July 2019, Altera petitioned U.S. Court of Appeals for the Ninth Circuit to hold an en banc rehearing of the case. The petition was subsequently denied by the Ninth Circuit. Altera appealed the case to the U.S. Supreme Court in February 2020, but the U.S. Supreme Court declined to hear the case in June 2020, leaving intact the U.S. Court of Appeals for the Ninth Circuit’s decision. AOS has not recorded any benefit related to the Altera Corporation Tax Court decision in any period through March 2021. The Company will continue to monitor ongoing developments and potential impact to its financial statements.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.