Emergence from the Chapter 11 Cases (Details)	9 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares
Emergence from the Chapter 11 Cases (Details) [Line Items]
Common stock (in Shares) | shares	2,857,143
Purchase price per share	$ 3.85
Aggregate of purchase price (in Dollars) | $	$ 11,000,000
Ownership percentage	35.11%
Capital stucture, description	●New Capital Structure for JetFleet Holding Corp. (“JHC”). On the Effective Date, the following transactions relating to JHC equity ownership was executed: a)Cancellation of ACY Equity in JHC. All outstanding stock of JetFleet Holding Corp. (“JHC”) currently held 100% by its parent, AeroCentury, was canceled.   b)JHC Common Stock Issuance to Plan Sponsor and JHC Management. Plan Sponsor acquired 35,000 shares of common stock of JHC, and certain employees of JHC (“JHC Management”) who would be appointed to continue the legacy aircraft leasing business of AeroCentury through JHC shall acquire 65,000 shares of common stock of JHC. All shares of common stock of JHC would be purchased at a price of $1 per share.   c)JHC Series A Preferred Stock Issuance to AeroCentury Corp. AeroCentury used $2 million of its proceeds from the Plan Sponsor’s purchase of New ACY Shares to purchase new JHC Series A Preferred Stock from JHC. The JHC Series A Preferred Stock shall carry a dividend rate of 7.5% per annum, shall be non-convertible and non-transferable, should be redeemable by JHC at any time, but shall only be redeemable by AeroCentury after 7 years. The JHC Series A Preferred Stockholders shall in the aggregate constitute 51% of the voting equity of JHC, voting as a single class together with the outstanding JHC Common Stock.   d)Distribution of Trust Interest in JHC Series B to Legacy ACY Shareholders. A trust (“Legacy Trust”) was established for the benefit of the Legacy ACY Shareholders, and JHC issued new JHC Series B Preferred Stock to the Legacy Trust. The JHC Series B Preferred Stock issued to the Legacy Trust will have an aggregate liquidation preference of $1, non-convertible, non-transferable, non-voting, will not pay a dividend, and will contain a mandatory, redeemable provision. The JHC Series B Preferred Stock was redeemable for an aggregate amount equal to (i) $1,000,000, if the JHC Series B Preferred Stock is redeemed after the first fiscal year for which JHC reports positive EBITDA for the preceding 12-month period, or (ii) $0.001 per share, if the JHC Series B Preferred Stock is redeemed prior the first fiscal year for which JHC reports positive EBITDA for the preceding 12-month period.
Common stock price	$ 3.85
Sponsor [Member]
Emergence from the Chapter 11 Cases (Details) [Line Items]
Purchase price per share	$ 0.001
Aggregate of purchase price (in Dollars) | $	$ 11,053,100
Ownership percentage	64.89%
Issuance of common stock (in Shares) | shares	2,870,927