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Statements of Income (Unaudited) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Income Statement [Abstract]        
Revenues $ 5,211,742 $ 4,485,253 $ 10,255,528 $ 8,490,997
Cost of revenues 2,632,031 2,370,284 5,169,537 4,568,390
Gross profit 2,579,711 2,114,969 5,085,991 3,922,607
Operating expenses:        
Research and development 741,113 550,284 1,398,131 1,125,335
Sales and marketing 682,756 609,308 1,369,524 1,227,574
General and administrative 576,553 466,326 1,139,104 1,069,552
Total operating expenses 2,000,422 1,625,918 3,906,759 3,422,461
Operating income 579,289 489,051 1,179,232 500,146
Interest expense (29,766) (79,999) (73,410) (154,669)
Net income before income taxes 549,523 409,052 1,105,822 345,477
Income tax expense (32,585) (7,985) (40,570) (15,970)
Net income $ 516,938 $ 401,067 $ 1,065,252 $ 329,507
Net income per share:        
Basic $ 0.09 $ 0.07 $ 0.19 $ 0.06
Diluted $ 0.07 $ 0.07 $ 0.15 $ 0.06
Weighted average shares outstanding:        
Basic 5,821,891 5,545,270 5,733,267 5,529,429
Diluted 7,267,169 5,911,253 6,925,018 5,960,681