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v3.20.1

Segment Information - Financial Data by Segment (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018
Net sales | $ 33,872,000 | $ 36,995,000 | $ 40,220,000 | $ 31,370,000 | $ 31,130,000 | $ 34,731,000 | $ 39,751,000 | $ 31,709,000 | $ 142,457,342 | $ 137,321,395
Operating income |  |  |  |  |  |  |  |  | 8,429,348 | 7,456,906
Assets | 110,748,853 |  |  |  | 109,477,786 |  |  |  | 110,748,853 | 109,477,786
Additions to property, plant and equipment |  |  |  |  |  |  |  |  | 1,680,000 | 2,851,000
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,433,000 | 3,229,000
United States Segment |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 125,717,000 | 120,993,000
Operating income |  |  |  |  |  |  |  |  | 7,199,000 | 6,103,000
Assets | 98,577,000 |  |  |  | 99,721,000 |  |  |  | 98,577,000 | 99,721,000
Additions to property, plant and equipment |  |  |  |  |  |  |  |  | 1,646,000 | 2,705,000
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,347,000 | 3,153,000
Canada Segment |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 6,678,000 | 7,040,000
Operating income |  |  |  |  |  |  |  |  | 771,000 | 884,000
Assets | 6,168,000 |  |  |  | 3,839,000 |  |  |  | 6,168,000 | 3,839,000
Additions to property, plant and equipment |  |  |  |  |  |  |  |  | 2,000 | 83,000
Depreciation and amortization |  |  |  |  |  |  |  |  | 16,000 | 9,000
Europe Segment |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 10,062,000 | 9,288,000
Operating income |  |  |  |  |  |  |  |  | 459,000 | 470,000
Assets | $ 6,003,000 |  |  |  | $ 5,918,000 |  |  |  | 6,003,000 | 5,918,000
Additions to property, plant and equipment |  |  |  |  |  |  |  |  | 32,000 | 63,000
Depreciation and amortization |  |  |  |  |  |  |  |  | $ 70,000 | $ 67,000

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