SHARE-BASED COMPENSATION - RSU Compensation Expense and the Related Income Tax Benefit (Details) - USD ($) $ in Thousands	12 Months Ended
Jan. 28, 2023	Jan. 29, 2022	Jan. 30, 2021
SHARE-BASED COMPENSATION
Compensation expense (income)	$ 335	$ 907	$ (613)
Income tax (benefit) provision	(86)	(233)	158
Compensation expense (income), net of tax	$ 249	$ 674	$ (455)

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