CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Total AOS Shareholders' Equity	Common Shares	Treasury Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	$ 431,888
Beginning balance at Jun. 30, 2020		$ 293,689	$ 64	$ (66,184)	$ 246,103	$ (5,127)	$ 118,833
Beginning balance, noncontrolling interest at Jun. 30, 2020								$ 138,199
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options and release of restricted stock units (in shares)			0
Exercise of common stock options and release of restricted stock units	1,495	1,495			1,495
Reissuance of treasury stock upon exercise of common stock options and release of RSUs	66	66		87			(21)
Withholding tax on restricted stock units	(953)	(953)			(953)
Issuance of shares under ESPP (in shares)			1
Issuance of shares under ESPP	1,636	1,636			1,635
Share-based compensation	4,700	4,700			4,700
Restricted stock units settlement in connection with service	2,000	2,000			2,000
Net loss	22,477	22,477					22,477
Net gain (loss) attributable to noncontrolling interest	(1,170)							(1,170)
Net income including noncontrolling interest through December 1, 2021	21,307
Cumulative translation adjustment		6,608				6,608
Cumulative translation adjustment, attributable to noncontrolling interest								5,909
Foreign currency translation adjustment	12,517
Ending balance at Dec. 31, 2020		331,718	$ 65	(66,097)	254,980	1,481	141,289
Ending balance, noncontrolling interest at Dec. 31, 2020								142,938
Ending balance, including portion attributable to noncontrolling interest at Dec. 31, 2020	474,656
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	449,222
Beginning balance at Sep. 30, 2020		309,108	$ 64	(66,171)	248,967	(2,146)	128,394
Beginning balance, noncontrolling interest at Sep. 30, 2020								140,114
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options and release of restricted stock units (in shares)			0
Exercise of common stock options and release of restricted stock units	1,495	1,495			1,495
Reissuance of treasury stock upon exercise of common stock options and release of RSUs	66	66		74			(8)
Withholding tax on restricted stock units	(541)	(541)			(541)
Issuance of shares under ESPP (in shares)			1
Issuance of shares under ESPP	1,636	1,636			1,635
Share-based compensation	2,424	2,424			2,424
Restricted stock units settlement in connection with service	1,000	1,000			1,000
Net loss	12,903	12,903					12,903
Net gain (loss) attributable to noncontrolling interest	(363)							(363)
Net income including noncontrolling interest through December 1, 2021	12,540
Cumulative translation adjustment		3,627				3,627
Cumulative translation adjustment, attributable to noncontrolling interest								3,187
Foreign currency translation adjustment	6,814
Ending balance at Dec. 31, 2020		331,718	$ 65	(66,097)	254,980	1,481	141,289
Ending balance, noncontrolling interest at Dec. 31, 2020								142,938
Ending balance, including portion attributable to noncontrolling interest at Dec. 31, 2020	474,656
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	474,656
Beginning balance, including portion attributable to noncontrolling interest	516,325
Beginning balance at Jun. 30, 2021	373,205	373,205	$ 66	(66,064)	259,993	2,315	176,895
Beginning balance, noncontrolling interest at Jun. 30, 2021	143,120							143,120
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options and release of restricted stock units (in shares)			0
Exercise of common stock options and release of restricted stock units	301	301			301
Reissuance of treasury stock upon exercise of common stock options and release of RSUs	0	0		18			(18)
Withholding tax on restricted stock units	(622)	(622)			(622)
Issuance of shares under ESPP (in shares)			1
Issuance of shares under ESPP	2,423	2,423			2,422
Share-based compensation	12,916	12,916			12,916
Restricted stock units settlement in connection with service	400	400			400
Net loss	406,422	406,422					406,422
Net gain (loss) attributable to noncontrolling interest	20							20
Net income including noncontrolling interest through December 1, 2021	406,442
Cumulative translation adjustment		738				738
Cumulative translation adjustment, attributable to noncontrolling interest								749
Foreign currency translation adjustment	1,487
Deconsolidation of noncontrolling interest	(145,682)	(1,793)				(1,793)		(143,889)
Ending balance at Dec. 31, 2021	793,990	793,990	$ 67	(66,046)	275,410	1,260	583,299
Ending balance, noncontrolling interest at Dec. 31, 2021	0							0
Ending balance, including portion attributable to noncontrolling interest at Dec. 31, 2021	793,990
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	541,990
Beginning balance at Sep. 30, 2021		400,871	$ 66	(66,052)	264,321	2,229	200,307
Beginning balance, noncontrolling interest at Sep. 30, 2021								141,119
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of common stock options and release of restricted stock units (in shares)			0
Exercise of common stock options and release of restricted stock units	301	301			301
Reissuance of treasury stock upon exercise of common stock options and release of RSUs	0	0		6			(6)
Withholding tax on restricted stock units	(448)	(448)			(448)
Issuance of shares under ESPP (in shares)			1
Issuance of shares under ESPP	2,423	2,423			2,422
Share-based compensation	8,414	8,414			8,414
Restricted stock units settlement in connection with service	400	400			400
Net loss	382,998	382,998					382,998
Net gain (loss) attributable to noncontrolling interest	2,007							2,007
Net income including noncontrolling interest through December 1, 2021	385,005
Cumulative translation adjustment		824				824
Cumulative translation adjustment, attributable to noncontrolling interest								763
Foreign currency translation adjustment	1,587
Deconsolidation of noncontrolling interest	(145,682)	(1,793)				(1,793)		(143,889)
Ending balance at Dec. 31, 2021	793,990	$ 793,990	$ 67	$ (66,046)	$ 275,410	$ 1,260	$ 583,299
Ending balance, noncontrolling interest at Dec. 31, 2021	0							$ 0
Ending balance, including portion attributable to noncontrolling interest at Dec. 31, 2021	793,990
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, including portion attributable to noncontrolling interest	$ 793,990