Award Timing Disclosure	12 Months Ended
Award Timing Disclosure	Dec. 31, 2024
Award Timing Disclosures [Line Items]
Award Timing MNPI Disclosure	Policies and Practices Related to the Grant of Certain Equity Awards Close in Time to the Release of Material Nonpublic Information The Company does not have any formal policy that requires the Company to grant, or avoid granting, stock options at particular times. Consistent with its annual compensation cycle, if options are to be granted, the Compensation Committee generally seeks to grant annual stock option awards after its Annual Report on Form 10-K has been filed. The Company does not typically grant stock options to its directors. The timing of any stock option grants in connection with new hires, promotions, or other non-routine grants is tied to the event giving rise to the award (such as an employee’s commencement of employment or promotion effective date). As a result, in all cases, the timing of grants of stock options occurs independent of the release of any material nonpublic information, and the Company does not time the disclosure of material nonpublic information for the purpose of affecting the value of executive compensation. No stock options were issued to executive officers in 2024 during any period beginning four business days before the filing of a periodic report or current report disclosing material non-public information and ending one business day after the filing or furnishing of such report with the SEC.
Award Timing Method	As a result, in all cases, the timing of grants of stock options occurs independent of the release of any material nonpublic information, and the Company does not time the disclosure of material nonpublic information for the purpose of affecting the value of executive compensation.
Award Timing MNPI Considered	false
MNPI Disclosure Timed for Compensation Value	false

Altair Engineering Inc. 10-K/A