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Statements of Income (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Income Statement [Abstract]    
Product sales $ 2,986,359 $ 3,101,491
Costs of goods sold 1,228,799 1,250,566
Gross margin 1,757,560 1,850,925
Sales and marketing expenses 418,998 388,903
Administrative expenses 337,155 311,305
Product development expenses 302,443 330,665
Operating expenses 1,058,596 1,030,873
NET OPERATING INCOME 698,964 820,052
Other expenses, net 23,387 5,450
INCOME BEFORE INCOME TAXES 675,577 814,602
Income tax expense 223,129 335,520
NET INCOME $ 452,448 $ 479,082
Weighted average common shares outstanding:    
Basic 3,833,056 3,027,345
Diluted 3,944,350 3,143,576
NET INCOME PER SHARE:    
Basic $ 0.12 $ 0.16
Diluted $ 0.11 $ 0.15