DESCRIPTION OF BUSINESS (Details) $ in Thousands		1 Months Ended		12 Months Ended
	Sep. 13, 2017	Nov. 30, 2021 USD ($) shares	Aug. 31, 2019 shares	Dec. 31, 2021 shares	Dec. 31, 2019 USD ($)	Nov. 30, 2021 ¥ / shares shares	Dec. 31, 2020 shares	Nov. 08, 2017	Aug. 31, 2017
Class A Common Stock [Member]
Description of Business [Abstract]
Reverse stock split	0.33
Offering of shares (in shares)			2,053,572
Common stock, shares outstanding (in shares)				17,869,643			16,896,693
Class B Common Stock [Member]
Description of Business [Abstract]
Reverse stock split	0.33
Common stock, shares outstanding (in shares)				1,695,938			1,802,606
ACM Research (Shanghai), Inc. [Member]
Description of Business [Abstract]
Purchase of equity interest percentage				8.30%				18.36%	18.77%
Term to complete listing of shares				3 years
Name of subsidiaries				ACM Research (Shanghai), Inc.
Place and date of incorporation				PRC, May 2005
Effective interest held as at				82.50%			91.70%
ACM Research (Shanghai), Inc. [Member] | IPO [Member]
Description of Business [Abstract]
Offering of shares (in shares)		43,355,753
Percentage amount of shares offered from shares outstanding						10.00%
Common stock, shares outstanding (in shares)						433,557,100
Share price (in RMB per share) | ¥ / shares						¥ 85.00
Net proceeds of stock issuance cost | $		$ 545,512
Percentage of shares owned by company after stock issuance		82.50%
ACM Research (Wuxi), Inc. [Member]
Description of Business [Abstract]
Name of subsidiaries				ACM Research (Wuxi), Inc.
Place and date of incorporation				PRC, July 2011
Effective interest held as at				82.50%			91.70%
CleanChip Technologies Limited [Member]
Description of Business [Abstract]
Proceeds from sale of interest in subsidiary | $					$ 3,500
Name of subsidiaries				CleanChip Technologies Limited
Place and date of incorporation				Hong Kong, September 2017
Effective interest held as at				82.50%			91.70%
ACM Research Korea CO., LTD [Member]
Description of Business [Abstract]
Name of subsidiaries				ACM Research Korea CO., LTD.
Place and date of incorporation				Korea, December 2017
Effective interest held as at				82.50%			91.70%
Shengwei Research (Shanghai), Inc. [Member]
Description of Business [Abstract]
Purchase of equity interest percentage				91.70%
Name of subsidiaries				Shengwei Research (Shanghai), Inc.
Place and date of incorporation				PRC, March 2019
Effective interest held as at				82.50%			91.70%
ACM Research (CA), Inc. [Member]
Description of Business [Abstract]
Name of subsidiaries				ACM Research (CA), Inc.
Place and date of incorporation				USA, April 2019
Effective interest held as at				82.50%			91.70%
ACM Research (Cayman), Inc. [Member]
Description of Business [Abstract]
Name of subsidiaries				ACM Research (Cayman), Inc.
Place and date of incorporation				Cayman Islands, April 2019
Effective interest held as at				100.00%			100.00%
ACM Research (Singapore) PTE. LTD. [Member]
Description of Business [Abstract]
Name of subsidiaries				ACM Research (Singapore) PTE. Ltd.
Place and date of incorporation				Singapore, August 2021
Effective interest held as at				100.00%