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Segment Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | $ 370,785,000 | $ 349,637,000
Interest Expense | 603,000 | 1,009,000
Gross Profit | 197,354,000 | 189,540,000
Operating Income (Loss) | 9,066,000 | 9,210,000
Long-Lived Assets | 61,327,000 | 57,046,000
Other Nonoperating Income (Expense) | 1,211,000 | (1,338,000)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest | 9,674,000 | 6,863,000
Payments to Acquire Property, Plant, and Equipment | 2,028,000 | 2,524,000
Depreciation, Depletion and Amortization | 5,893,000 | 6,855,000
Assets | 204,429,000 | 197,142,000
Notes Receivable, Related Parties | (8,548,000) | (8,141,000)
United States |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 295,675,000 | 279,917,000
Long-Lived Assets | 25,478,000 | 25,539,000
Canada |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 75,110,000 | 69,720,000
Long-Lived Assets | 35,849,000 | 31,507,000
Lawson [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 329,367,000 | 313,095,000
Gross Profit | 181,567,000 | 175,517,000
Operating Income (Loss) | 6,483,000 | 7,500,000
Payments to Acquire Property, Plant, and Equipment | 1,522,000 | 1,907,000
Depreciation, Depletion and Amortization | 4,757,000 | 6,008,000
Assets | 168,803,000 | 169,216,000
Bolt [Member] [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Revenue from Contract with Customer, Including Assessed Tax | 41,418,000 | 36,542,000
Gross Profit | 15,787,000 | 14,023,000
Operating Income (Loss) | 2,583,000 | 1,710,000
Payments to Acquire Property, Plant, and Equipment | 506,000 | 617,000
Depreciation, Depletion and Amortization | 1,136,000 | 847,000
Assets | $ 44,174,000 | $ 36,067,000

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