Segment and Geographic Information - Operating Segment Data (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jan. 31, 2019
Operating segment data
Net sales		$ 157,816	$ 144,093	$ 304,365	$ 271,242
Operating Income	[1]	8,776	12,860	13,750	20,999
Total Assets	[2]	840,631	627,248	840,631	627,248	$ 759,701
Watch and Accessory Brands
Operating segment data
Net sales		136,806	123,082	268,301	235,182
Operating Income	[1]	5,698	8,202	8,793	14,569
Total Assets	[2]	772,653	601,788	772,653	601,788	735,244
Watch and Accessory Brands | Owned brands category
Operating segment data
Net sales		56,690	51,533	108,609	93,116
Watch and Accessory Brands | Licensed brands category
Operating segment data
Net sales		77,486	69,722	150,281	135,573
Watch and Accessory Brands | After-sales service and all other
Operating segment data
Net sales		2,630	1,827	9,411	6,493
Company Stores
Operating segment data
Net sales		21,010	21,011	36,064	36,060
Operating Income	[1]	3,078	4,658	4,957	6,430
Total Assets	[2]	$ 67,978	$ 25,460	$ 67,978	$ 25,460	$ 24,457

[1] For the three and six months ended July 31, 2019, in the United States location of the Watch and Accessory Brands, operating loss included a charge of $1.1 million and $2.6 million, respectively related to the amortization of intangible assets, deferred compensation and certain acquisition accounting adjustments associated with the MVMT brand. In the United States locations of the Watch and Accessory Brands segment, for the three months and six months ended July 31, 2018, operating income included $1.0 million, of expenses primarily associated with the then pending acquisition of MVMT.

[2] Total assets at July 31, 2019 include $49.4 million and $41.7 million of operating lease right-of-use assets within Watch and Accessory Brands and Company Stores, respectively, recorded as a result of the Company’s adoption of ASU 2016-02 on February 1, 2019 (see Note 10 – Leases).