a.k.a. Brands Holding Corp. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Equity-based Compensation - Narrative (Details)

Equity-based Compensation - Narrative (Details) $ / shares in Units, $ in Millions	1 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended	15 Months Ended	30 Months Ended
	May 31, 2024 segment $ / shares shares	Sep. 30, 2023 segment $ / shares shares	Sep. 30, 2021 shares	May 31, 2024 segment $ / shares shares	Sep. 30, 2024 USD ($) segment $ / shares shares	Dec. 31, 2018 shares	Mar. 31, 2022	Sep. 30, 2024 USD ($) segment $ / shares shares	May 22, 2024 shares	Dec. 31, 2023 $ / shares	May 30, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)					0
Weighted average exercise price (in dollars per share) \| $ / shares					$ 81.47			$ 81.47		$ 81.47
Options granted (in shares)					0
Unrecognized compensation cost \| $					$ 1.0			$ 1.0
ESPP purchase rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan shares (in shares)				11,580
Employee stock purchase plan, weighted average price (in USD per share) \| $ / shares	$ 8.05			$ 8.05
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period		10 years	10 years
Granted (in shares)		416,667
Number of tranches \| segment		4
Weighted average exercise price (in dollars per share) \| $ / shares		$ 109.27
Requisite service period		5 years 6 months
Weighted average period					4 years 6 months
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period					2 years
Vesting period							4 years	3 years
Total unrecognized compensation cost \| $					$ 9.6			$ 9.6
Time-based incentive units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost \| $					$ 0.3			$ 0.3
Weighted average period					6 months
Vesting period						4 years
2021 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in shares)			408,355		2,662,075			2,662,075	1,100,000		833,333
Annual increase of shares authorized for issuance			1.00%
2021 Omnibus Incentive Plan \| Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost \| $					$ 0.4			$ 0.4
Weighted average period					9 months 18 days
2021 Employee Stock Purchase Plan \| ESPP purchase rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in shares)			102,088		422,475			422,475
Annual increase of shares authorized for issuance			1.00%
Offering period			6 months
Percentage on share price issued			85.00%
2018 Stock and Incentive Compensation Plan \| Incentive Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares reserved for issuance (in shares)						16,475,735
Interim CEO Award \| RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	5 years
Granted (in shares)	150,000
Number of tranches \| segment	10			10
Requisite service period	2 years 10 months 24 days
Weighted average period					2 years
Number of tranches \| segment					2			2
Unrecognized compensation cost \| $					$ 0.4			$ 0.4