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COMMON STOCK	3 Months Ended
COMMON STOCK	Mar. 31, 2021
COMMON STOCK [Abstract]
COMMON STOCK	NOTE 17 – COMMON STOCK ACM is authorized to issue 50,000,000 shares of Class A common stock and 2,409,738 shares of Class B common stock, each with a par value of $0.0001. Each share of Class A common stock is entitled to one vote, and each share of Class B common stock is entitled to twenty votes and is convertible at any time into one share of Class A common stock. Shares of Class A common stock and Class B common stock are treated equally, identically and ratably with respect to any dividends declared by the Board of Directors unless the Board of Directors declares different dividends to the Class A common stock and Class B common stock by getting approval from a majority of common stockholders. During the three months ended March 31, 2021, ACM issued 309,940 shares of Class A common stock upon option exercises by employees and non-employees and an additional 33,334 shares of Class A common stock upon conversion of an equal number of shares of Class B common stock. During the three months ended March 31, 2020, ACM issued 70,478 shares of Class A common stock upon option exercises by employees and non-employees, and an additional 64,717 shares of Class A common stock upon a cashless warrant exercise by a non-employee. At March 31, 2021 and December 31, 2020 the number of shares of Class A common stock issued and outstanding was 17,239,967, and 16,896,693, respectively. At March 31, 2021 and December 31, 2020, the number of shares of Class B common stock issued and outstanding was 1,769,272 and 1,802,606, respectively.