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Acquisitions - Summary of Unaudited Pro Forma Information (Details) - Antenna Plus - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Business Acquisition [Line Items]        
Pro forma sales $ 13,506,610 $ 12,030,154 $ 26,533,604 $ 22,263,313
Pro forma income (loss) from operations (130,412) 1,386,825 680,581 1,746,412
Pro forma net income (loss) $ (73,379) $ 1,723,995 $ 697,231 $ 2,106,169