CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Total AOS Shareholders' Equity	Common Shares	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Retained Earnings	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	$ 426,162
Beginning balance at Jun. 30, 2018		$ 278,594	$ 61	$ (64,790)	$ 220,244	$ 440	$ 122,639
Beginning balance, noncontrolling interest at Jun. 30, 2018								$ 147,568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	445,485
Exercise of common stock options and release of RSUs	110	110	1		109
Reissuance of treasury stock upon exercise of common stock options and release of restricted stock units				51			(51)
Withholding tax on restricted stock units	(1,946)	(1,946)			(1,946)
Issuance of shares under ESPP	1,168	1,168			1,168
Repurchase of common shares under shares repurchase program	(1,501)	(1,501)		(1,501)
Share-based compensation	10,659	10,659			10,659
Net loss	(684)	(684)					(684)
Net loss attributable to noncontrolling interest	(11,719)							(11,719)
Net loss including noncontrolling interest	(12,403)
Impact on retained earnings related to ASC 606 adoption | Accounting Standards Update 2016-16	1,036	1,036					1,036
Cumulative translation adjustment		(1,003)				(1,003)
Cumulative translation adjustment, attributable to noncontrolling interest								(797)
Cumulative translation adjustment, including portion attributable to noncontrolling interest	(1,800)
Contributions from noncontrolling interest	24,000							24,000
Ending balance at Mar. 31, 2019		286,433	62	(66,240)	230,234	(563)	122,940
Ending balance, noncontrolling interest at Mar. 31, 2019								159,052
Ending balance, including portion attributable to noncontrolling interest at Mar. 31, 2019	445,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	444,528
Beginning balance at Dec. 31, 2018		283,292	61	(66,283)	227,818	(2,842)	124,538
Beginning balance, noncontrolling interest at Dec. 31, 2018								161,236
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	445,485
Exercise of common stock options and release of RSUs			1		(1)
Reissuance of treasury stock upon exercise of common stock options and release of restricted stock units				43			(43)
Withholding tax on restricted stock units	(1,743)	(1,743)			(1,743)
Share-based compensation	4,160	4,160			4,160
Net loss	(1,555)	(1,555)					(1,555)
Net loss attributable to noncontrolling interest	(4,400)							(4,400)
Net loss including noncontrolling interest	(5,955)
Cumulative translation adjustment		2,279				2,279
Cumulative translation adjustment, attributable to noncontrolling interest								2,216
Cumulative translation adjustment, including portion attributable to noncontrolling interest	4,495
Ending balance at Mar. 31, 2019		286,433	62	(66,240)	230,234	(563)	122,940
Ending balance, noncontrolling interest at Mar. 31, 2019								159,052
Ending balance, including portion attributable to noncontrolling interest at Mar. 31, 2019	445,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	445,485
Beginning balance, including portion attributable to noncontrolling interest	443,289
Beginning balance at Jun. 30, 2019	291,024	291,024	62	(66,240)	234,410	(2,693)	125,485
Beginning balance, noncontrolling interest at Jun. 30, 2019	152,265							152,265
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	429,729
Exercise of common stock options and release of RSUs	26	26			26
Reissuance of treasury stock upon exercise of common stock options and release of restricted stock units				56			(56)
Withholding tax on restricted stock units	(1,398)	(1,398)			(1,398)
Issuance of shares under ESPP	1,701	1,701	1		1,700
Share-based compensation	7,732	7,732			7,732
Net loss	(6,491)	(6,491)					(6,491)
Net loss attributable to noncontrolling interest	(9,826)							(9,826)
Net loss including noncontrolling interest	(16,317)
Cumulative translation adjustment		(2,715)				(2,715)
Cumulative translation adjustment, attributable to noncontrolling interest								(2,589)
Cumulative translation adjustment, including portion attributable to noncontrolling interest	(5,304)
Ending balance at Mar. 31, 2020	289,879	289,879	63	(66,184)	242,470	(5,408)	118,938
Ending balance, noncontrolling interest at Mar. 31, 2020	139,850							139,850
Ending balance, including portion attributable to noncontrolling interest at Mar. 31, 2020	429,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	440,150
Beginning balance at Dec. 31, 2019		295,870	63	(66,227)	240,797	(4,239)	125,476
Beginning balance, noncontrolling interest at Dec. 31, 2019								144,280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	429,729
Reissuance of treasury stock upon exercise of common stock options and release of restricted stock units				43			(43)
Withholding tax on restricted stock units	(1,203)	(1,203)			(1,203)
Share-based compensation	2,876	2,876			2,876
Net loss	(6,495)	(6,495)					(6,495)
Net loss attributable to noncontrolling interest	(3,391)							(3,391)
Net loss including noncontrolling interest	(9,886)
Cumulative translation adjustment		(1,169)				(1,169)
Cumulative translation adjustment, attributable to noncontrolling interest								(1,039)
Cumulative translation adjustment, including portion attributable to noncontrolling interest	(2,208)
Ending balance at Mar. 31, 2020	289,879	$ 289,879	$ 63	$ (66,184)	$ 242,470	$ (5,408)	$ 118,938
Ending balance, noncontrolling interest at Mar. 31, 2020	139,850							$ 139,850
Ending balance, including portion attributable to noncontrolling interest at Mar. 31, 2020	429,729
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	$ 429,729