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Acquisitions - Additional Information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Apr. 27, 2017
Dec. 17, 2015
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Business Acquisition [Line Items]                          
Business acquisition, revenue     $ 12,807,175 $ 12,448,436 $ 13,013,143 $ 11,252,417 $ 12,625,966 $ 12,439,279 $ 9,856,317 $ 8,512,305 $ 49,521,171 $ 43,433,867 $ 27,793,073
Business acquisition, cost of goods sold                     26,218,965 24,156,792 16,148,163
Net income (loss)     591,933 $ 234,353 $ (70,121) $ 385,090 1,100,302 $ 1,183,044 $ 1,311,209 $ 139,153 1,141,255 3,733,707 (270,342)
Goodwill     $ 3,700,447       $ 1,249,956       3,700,447 1,249,956 1,249,956
Business acquisition up front payment                     6,348,730   $ 4,000,000
Antenna Plus                          
Business Acquisition [Line Items]                          
Total consideration paid in cash $ 6,348,730                        
Business acquisition, revenue                     5,200,000    
Business acquisition, cost of goods sold                     2,300,000    
Net income (loss)                     $ 400,000    
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 2015 or of the results of future operations of the combined business.    
Goodwill 2,450,491                        
Business acquisition up front payment 6,383,500                        
Accounts receivable $ 584,390                        
Skycross, Inc.                          
Business Acquisition [Line Items]                          
Total consideration paid in cash   $ 5,000,000                      
Business acquisition, revenue                     $ 5,200,000 5,000,000  
Business acquisition, cost of goods sold                     $ 1,700,000 1,700,000  
Date of asset purchase agreement                     Dec. 17, 2015    
Goodwill   1,249,956                      
Goodwill, expected tax deductible amount   1,249,956                      
Business acquisition up front payment   4,000,000                      
Business combination, contingent consideration arrangements, description                     The $1.0 million of deferred consideration is payable upon the later of (i) the expiration of the Transition Services Agreement between the Company and Skycross which defines transition services to be provided by Skycross to the Company, and (ii) the date on which the Company has received copies of third party approvals with respect to each customer and program that was purchased.    
Contingent consideration arrangement   1,000,000                 $ 1,000,000 $ 1,000,000  
Amount to be paid under contingent consideration arrangements, value, low   0                      
Amount to be paid under contingent consideration arrangements, value, high   1,000,000                      
Accounts receivable   $ 429,267