Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment (Details)

v3.20.1
Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 106,201 $ 105,497
Less accumulated deprecation 66,815 64,807
Property, plant and equipment, net 39,386 40,690
Land    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 63 63
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 2,055 1,921
Buildings    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 214 214
Machinery, fixtures and equipment    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 100,832 100,300
Construction in progress    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 3,037 $ 2,999