Segment Information - Financial Data by Segment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Net sales	$ 193,962,357	$ 182,087,559
Operating income	6,273,302	12,769,987
Assets	164,377,104	144,438,684
Additions to property, plant and equipment	4,305,000	6,373,000
Depreciation and amortization	4,578,000	4,049,000
United States Segment
Net sales	165,205,000	152,475,000
Operating income	4,783,000	9,521,000
Assets	144,466,000	125,521,000
Additions to property, plant and equipment	4,174,000	6,309,000
Depreciation and amortization	4,398,000	3,822,000
Canada Segment
Net sales	13,779,000	14,341,000
Operating income	1,136,000	1,893,000
Assets	9,078,000	9,100,000
Additions to property, plant and equipment	52,000	10,000
Depreciation and amortization	96,000	147,000
Europe Segment
Net sales	14,978,000	15,272,000
Operating income	354,000	1,356,000
Assets	10,833,000	9,818,000
Additions to property, plant and equipment	79,000	54,000
Depreciation and amortization	$ 84,000	$ 80,000