Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment (Details)

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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Property, Plant and Equipment [Line Items]      
Property, plant and equipment at cost $ 141,757 $ 130,738  
Accumulated depreciation (73,422) (67,450)  
Property, plant and equipment, net 68,335 63,288  
Depreciation expense 8,679 9,784 $ 11,415
Land, buildings and improvements      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment at cost 57,514 55,456  
Machinery and equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment at cost 57,892 48,912  
Office furniture and equipment      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment at cost 19,239 18,164  
Internally developed software      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment at cost 5,069 5,069  
Depreciation expense   9,784 11,415
Depreciation, depletion and amortization 226 334 $ 346
Construction in progress      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment at cost $ 2,043 $ 3,137