Quarterly report [Sections 13 or 15(d)]

Property, Plant and Equipment (Details)

v3.26.1
Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Property, Plant, and Equipment [Line Items]          
Total property, plant and equipment, gross $ 47,257   $ 47,257   $ 45,424
Less: accumulated depreciation and amortization (31,564)   (31,564)   (29,662)
Property, plant and equipment, net 15,693   15,693   15,762
Total depreciation 847 $ 881 1,737 $ 1,870  
Location, Statement of Income, Balance [Axis]: acnt:SellingGeneralAndAdministrativeExpenseAndDepreciationDepletionAndAmortization          
Property, Plant, and Equipment [Line Items]          
Total depreciation 83 43 166 110  
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold          
Property, Plant, and Equipment [Line Items]          
Total depreciation 764 $ 838 1,571 $ 1,760  
Land          
Property, Plant, and Equipment [Line Items]          
Total property, plant and equipment, gross 518   518   518
Leasehold improvements          
Property, Plant, and Equipment [Line Items]          
Total property, plant and equipment, gross 2,754   2,754   2,624
Buildings          
Property, Plant, and Equipment [Line Items]          
Total property, plant and equipment, gross 1,830   1,830   1,830
Machinery, fixtures and equipment          
Property, Plant, and Equipment [Line Items]          
Total property, plant and equipment, gross 41,183   41,183   40,120
Construction-in-progress          
Property, Plant, and Equipment [Line Items]          
Total property, plant and equipment, gross $ 972   $ 972   $ 332