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Segment Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Interest Expense | $ 1,009,000 | $ 622,000
Net sales | 349,637,000 | 305,907,000
Gross Profit | 189,540,000 | 183,018,000
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | 0 | 5,422,000
Operating Income (Loss) | 9,210,000 | 9,936,000
Long-Lived Assets | 57,046,000 | 59,008,000
Other Nonoperating Income (Expense) | (1,338,000) | 780,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest | 6,863,000 | 10,094,000
Payments to Acquire Property, Plant, and Equipment | 2,524,000 | 1,256,000
Depreciation, Depletion and Amortization | 6,855,000 | 6,770,000
Assets | 197,142,000 | 191,111,000
Notes Receivable, Related Parties | (8,141,000) | (8,832,000)
United States |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net sales | 279,917,000 | 266,994,000
Long-Lived Assets | 25,539,000 | 24,686,000
Canada |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net sales | 69,720,000 | 38,913,000
Long-Lived Assets | 31,507,000 | 34,322,000
Lawson [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net sales | 313,095,000 | 297,953,000
Gross Profit | 175,517,000 | 179,578,000
Operating Income (Loss) | 7,500,000 | 4,164,000
Payments to Acquire Property, Plant, and Equipment | 1,907,000 | 1,251,000
Depreciation, Depletion and Amortization | 6,008,000 | 6,280,000
Assets | 169,216,000 | 161,520,000
Bolt [Member] [Member] |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Net sales | 36,542,000 | 7,954,000
Gross Profit | 14,023,000 | 3,440,000
Operating Income (Loss) | 1,710,000 | 350,000
Payments to Acquire Property, Plant, and Equipment | 617,000 | 5,000
Depreciation, Depletion and Amortization | 847,000 | 490,000
Assets | $ 36,067,000 | $ 38,423,000

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