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Impact of the COVID-19 Pandemic - Additional Information (Details) - USD ($)	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Mar. 31, 2020
Unusual Or Infrequent Item [Line Items]
Dividend declared		$ 4,591,000
Corporate initiative costs	$ 7,240,000	$ 0
Covid 19
Unusual Or Infrequent Item [Line Items]
Dividend declared	0
Corporate initiative costs	7,200,000
Increase in inventory reserves	3,500,000
Write-off related to non-refundable deposits	1,500,000
Increase in bad debt reserves	1,100,000
Restructuring reserves including severance	1,100,000
Impairment charges related to goodwill	133,700,000
Impairment charges related to intangible assets	$ 22,200,000
Covid 19 \| Revolving Credit Facility
Unusual Or Infrequent Item [Line Items]
Line of credit facility additional borrowing capacity			$ 30,900,000
Covid 19 \| Minimum \| Revolving Credit Facility
Unusual Or Infrequent Item [Line Items]
Line of credit facility covenants term	1 year