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Geographic Segment Data (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Segment Reporting Information [Line Items]          
Net Sales to Outside Customers $ 13,476,157 $ 14,880,820 $ 42,831,655 $ 43,476,981  
Total Assets 44,997,129   44,997,129   $ 41,804,969
United States [Member]          
Segment Reporting Information [Line Items]          
Net Sales to Outside Customers 10,392,000 11,377,000 33,527,000 33,904,000  
Total Assets 33,121,000   33,121,000   30,772,000
Europe [Member]          
Segment Reporting Information [Line Items]          
Net Sales to Outside Customers 761,000 374,000 1,927,000 1,031,000  
Total Assets 2,391,000   2,391,000   1,562,000
Mexico [Member]          
Segment Reporting Information [Line Items]          
Net Sales to Outside Customers 1,723,000 2,606,000 5,438,000 6,867,000  
Total Assets 7,871,000   7,871,000   7,680,000
United Kingdom [Member]          
Segment Reporting Information [Line Items]          
Net Sales to Outside Customers 600,000 $ 524,000 1,940,000 $ 1,675,000  
Total Assets $ 1,594,000   $ 1,594,000   $ 1,791,000