Commitments and Contingencies - Additional Information (Details)		1 Months Ended	6 Months Ended
	Oct. 01, 2018 USD ($) ContingentPayment	Dec. 31, 2016 USD ($)	Jul. 31, 2020 USD ($)	Jan. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Tax cuts and jobs act, deemed repatriation tax			$ 28,200,000
Payment of deemed repatriation tax installments period			8 years
Underpaid duty charges due to alternative duty methodology		$ 5,100,000
Underpaid duty methodology period covered by statute of limitation		5 years
MVMT Watches, Inc.
Loss Contingencies [Line Items]
Business acquisition, number of future contingent payments | ContingentPayment	2
Business acquisition, liability				$ 0	$ 1,900,000
MVMT Watches, Inc. | Maximum
Loss Contingencies [Line Items]
Business acquisition, additional purchase price future contingent payments before tax benefits	$ 100,000,000.0