Summary of Business and Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2026

Accounting Policies [Abstract]

Schedule of inventory, net

The following table presents a breakdown of the Company’s inventories:

	January 31,
	2026		2025
	(In thousands)
Finished goods	$	21,923	$	19,599
Work in process	20,084		21,357
Raw materials	14,728		14,691
Inventories	$	56,735	$	55,647

Schedule of Property Plant and Equipment

Property, plant and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation and amortization are computed on the straight-line method for financial reporting purposes based upon the following estimated useful lives:

Land improvements	5 to 25 years
Buildings and building improvements	5 to 40 years
Machinery and equipment	3 to 10 years
Leasehold improvements	shorter of lease or useful life

Property, plant, and equipment, net consists of the following:

	January 31,
	2026		2025
	(In thousands)
Land	$	3,731	$	3,731
Land improvements	706		706
Buildings and building improvements	52,059		52,030
Machinery and equipment	123,179		119,972
Leasehold improvements	649		657
Property, plant and equipment, gross	180,324		177,096
Less accumulated depreciation and amortization	(145,746)		(140,668)
Property, plant and equipment, net	$	34,578	$	36,428

Asset retirement obligations related to leased manufacturing facilities

	January 31,
	2026		2025
	(In thousands)
Balance at beginning of period	$	445	$	212
Increase in obligation	—		200
Accretion expense	60		33
Balance at end of period	$	505	$	445

Computation of basic and diluted loss per share

The following table sets forth the computation of basic and diluted income per share:

	January 31,
	2026		2025
	(In thousands, except per share)
Numerator
Net income	$	2,568	$	21,644
Denominator
Weighted-average shares — basic	15,761		16,365
Dilutive effect of common stock equivalents from equity incentive plans	10		7
Weighted-average shares	15,771		16,372
Net income per common share
Basic	$	0.16	$	1.32
Diluted	$	0.16	$	1.32

Schedule of changes in accumulated balances of other comprehensive (loss) income, net of income tax

The following table summarizes the changes in accumulated balances of other comprehensive (loss) income, net of income tax:

	January 31,
	2026		2025
	(In thousands)
Balance as of beginning of year	$	422	$	(1,310)
Other comprehensive (loss) income before reclassifications	(197)		1,874
Amounts reclassified from accumulated comprehensive loss	(337)		(142)
Net current period other comprehensive (loss) income	(534)		1,732
Balance as of end of year	$	(112)	$	422