SHARE-BASED COMPENSATION - RSU compensation (income) expense and the related income tax provision (benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
Feb. 01, 2025	Feb. 03, 2024	Jan. 28, 2023
SHARE-BASED COMPENSATION
Compensation (income) expense	$ (609)	$ 579	$ 335
Income tax provision (benefit)	157	(149)	(86)
Compensation (income) expense, net of tax	$ (452)	$ 430	$ 249

Amount of tax provision (benefit) for recognition of (Income) expense of award under share-based payment arrangement.

No definition available.

Name:	cal_SharebasedPaymentArrangementIncomeExpenseTaxProvisionBenefit
Namespace Prefix:	cal_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration