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Statements of Income (Unaudited) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Income Statement [Abstract]        
Revenues $ 5,102,130 $ 4,517,898 $ 15,357,658 $ 13,008,895
Cost of revenues 2,472,315 2,279,922 7,641,852 6,848,312
Gross profit 2,629,815 2,237,976 7,715,806 6,160,583
Operating expenses:        
Research and development 704,335 576,284 2,102,466 1,701,619
Sales and marketing 694,061 609,666 2,063,585 1,837,240
General and administrative 513,114 450,783 1,652,218 1,520,335
Total operating expenses 1,911,510 1,636,733 5,818,269 5,059,194
Operating income 718,305 601,243 1,897,537 1,101,389
Interest expense (28,970) (63,483) (102,380) (218,152)
Net income before income taxes 689,335 537,760 1,795,157 883,237
Income tax expense (20,285) (7,985) (60,855) (23,955)
Net income $ 669,050 $ 529,775 $ 1,734,302 $ 859,282
Net income per share:        
Basic $ 0.11 $ 0.10 $ 0.30 $ 0.16
Diluted $ 0.10 $ 0.09 $ 0.27 $ 0.14
Weighted average shares outstanding:        
Basic 5,842,609 5,560,197 5,769,981 5,539,766
Diluted 6,924,255 5,980,382 6,849,988 5,959,951