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Unaudited Condensed Statements of Operations - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Income Statement [Abstract]    
Sales $ 11,252,417 $ 8,512,305
Cost of goods sold 5,963,959 4,834,681
Gross profit 5,288,458 3,677,624
Operating expenses:    
Research and development 1,596,799 1,321,686
Sales and marketing 1,628,141 1,241,104
General and administrative 1,638,039 998,040
Total operating expenses 4,862,979 3,560,830
Income from operations 425,479 116,794
Other expense (income):    
Interest income (37,201)  
Interest expense 30,764 52,475
Fair market value adjustment - warrants   (78,834)
Total other income (6,437) (26,359)
Income before income taxes 431,916 143,153
Provision for income taxes 46,826 4,000
Net income 385,090 139,153
Accretion of dividends on preferred convertible stock   (604,069)
Net income (loss) attributable to common stockholders $ 385,090 $ (464,916)
Net income (loss) per share:    
Basic $ 0.04 $ (0.70)
Diluted $ 0.04 $ (0.82)
Weighted average shares used in calculating income (loss) per share:    
Basic 9,359,562 665,842
Diluted 10,201,606 665,842