Segment and Geographic Information - Geographic Location 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
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales		$ 157,816	$ 144,093	$ 304,365	$ 271,242
Operating Income / (Loss)	[1]	8,776	12,860	13,750	20,999
Total Assets	[2]	840,631	627,248	840,631	627,248	$ 759,701
Property, plant and equipment, net		28,248	24,533	28,248	24,533	26,067
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	[3]	66,529	59,020	126,023	107,862
Operating Income / (Loss)	[1],[3]	(3,251)	(2,209)	(12,203)	(8,191)
Total Assets	[2]	397,502	206,346	397,502	206,346	328,014
Property, plant and equipment, net		18,793	16,771	18,793	16,771	17,030
International
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	[4]	91,287	85,073	178,342	163,380
Operating Income / (Loss)	[1],[4]	12,027	15,069	25,953	29,190
Total Assets	[2]	443,129	420,902	443,129	420,902	431,687
Property, plant and equipment, net		$ 9,455	$ 7,762	$ 9,455	$ 7,762	$ 9,037

[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).

[3] The United States operating loss included $4.1 million and $10.6 million of unallocated corporate expenses for the three months ended July 31, 2019 and 2018, respectively. The United States operating loss included $13.1 million and $20.7 million of unallocated corporate expenses for the six months ended July 31, 2019 and 2018, respectively.

[4] The International operating income included $14.8 million and $11.3 million of certain intercompany profits related to the Company’s supply chain operations for the three months ended July 31, 2019 and 2018, respectively. The International operating income included $27.8 million and $22.3 million of certain intercompany profits related to the Company’s supply chain operations for the six months ended July 31, 2019 and 2018, respectively.