Derivative Instruments - Offsetting Arrangements (Details) - USD ($) $ in Thousands	Oct. 31, 2020	Jan. 31, 2020
Derivative assets:
Net Amounts of Assets in the Condensed Consolidated Balance Sheets	$ 623	$ 683
Derivative liabilities:
Net Amounts of Liabilities in the Condensed Consolidated Balance Sheets	794	342
Foreign currency forward
Derivative assets:
Gross Amounts of Recognized Assets	623	683
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Assets in the Condensed Consolidated Balance Sheets	623	683
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	(623)	(342)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received	0	0
Net Assets Exposed	0	341
Derivative liabilities:
Gross Amounts of Recognized Liabilities	794	342
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities in the Condensed Consolidated Balance Sheets	794	342
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	(623)	(342)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received	0	0
Net Liabilities Exposed	171	0
Foreign currency forward | Counterparty A
Derivative assets:
Gross Amounts of Recognized Assets	5	102
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Assets in the Condensed Consolidated Balance Sheets	5	102
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	(5)	(5)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received	0	0
Net Assets Exposed	0	97
Derivative liabilities:
Gross Amounts of Recognized Liabilities	29	5
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities in the Condensed Consolidated Balance Sheets	29	5
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	(5)	(5)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received	0	0
Net Liabilities Exposed	24	0
Foreign currency forward | Counterparty B
Derivative assets:
Gross Amounts of Recognized Assets	618	581
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Assets in the Condensed Consolidated Balance Sheets	618	581
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	(618)	(337)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received	0	0
Net Assets Exposed	0	244
Derivative liabilities:
Gross Amounts of Recognized Liabilities	765	337
Gross Amounts Offset in the Condensed Consolidated Balance Sheets	0	0
Net Amounts of Liabilities in the Condensed Consolidated Balance Sheets	765	337
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments	(618)	(337)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Cash Collateral Received	0	0
Net Liabilities Exposed	$ 147	$ 0