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		12 Months Ended	15 Months Ended	27 Months Ended
	Sep. 29, 2023	May 31, 2024 segment $ / shares shares	Sep. 30, 2023 segment $ / shares shares	Sep. 30, 2021 shares	Jun. 30, 2024 USD ($) segment $ / shares shares	May 31, 2024 segment $ / shares shares	Dec. 31, 2018 shares	Mar. 31, 2022	Jun. 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]
Reverse stock split	0.0833
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 8 months 12 days
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period					1 year 6 months
Vesting period								4 years	3 years
Total unrecognized compensation cost \| $					$ 6.1				$ 6.1
Time-based incentive units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost \| $					$ 0.6				$ 0.6
Weighted average period					7 months 6 days
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 \| $					$ 0.5				$ 0.5
Weighted average period					1 year
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 2 months 12 days
Number of tranches \| segment					1				1
Unrecognized compensation cost \| $					$ 0.4				$ 0.4