Warranty (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 30, 2026	Apr. 30, 2025
Warranty claim activity
Beginning balance	$ 500	$ 500
Provision	34	43
Costs incurred	(34)	(43)
Ending balance	500	500
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent
Warranty [Line Items]
Product Warranty Accrual, Current	150	150
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesNoncurrent
Warranty [Line Items]
Product Warranty Accrual, Noncurrent	$ 350	$ 350
Maximum
Warranty [Line Items]
Product warranty period	10 years

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of increase in the standard and extended product warranty accrual from warranties issued.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Product warranty.

+ References

No definition available.

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- Definition

Warranty [Line Items]

+ References

No definition available.

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