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Acquisitions - Additional Information (Details) - USD ($)
 3 Months Ended
Apr. 27, 2017
Mar. 31, 2018
Mar. 31, 2017
Business Acquisition [Line Items]      
Business acquisition, revenue   $ 13,305,098 $ 11,252,417
Business acquisition, cost of goods sold   7,110,927 5,963,959
Net income (loss)   (1,105,791) $ 385,090
Antenna Plus      
Business Acquisition [Line Items]      
Total consideration paid in cash $ 6,348,730    
Business acquisition, revenue   2,300,000  
Business acquisition, cost of goods sold   900,000  
Net income (loss)   $ 700,000  
Business acquisition pro forma information description   The pro forma information includes adjustments to amortization and depreciation for intangible assets and property, plant and equipment acquired. The pro forma data are for informational purposes only and are not necessarily indicative of the consolidated results of operations of the combined business had the acquisition actually occurred at the beginning of fiscal year 2017 or of the results of future operations of the combined business.