SHARE-BASED COMPENSATION - RSU Compensation Expense and the Related Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
Feb. 03, 2024	Jan. 28, 2023	Jan. 29, 2022
SHARE-BASED COMPENSATION
Compensation expense.	$ 579	$ 335	$ 907
Income tax benefit	(149)	(86)	(233)
Compensation expense, net of tax	$ 430	$ 249	$ 674

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