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Unaudited Quarterly Financial Data (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]                              
Product sales $ 2,694,407 $ 2,472,428 $ 1,960,363 $ 3,101,491 $ 2,205,275 $ 1,770,129 $ 1,539,719 $ 2,081,752 $ 1,559,248 $ 1,234,701 $ 1,366,493 $ 1,846,734 $ 10,228,689 $ 7,596,874 $ 6,007,176
Gross margin 1,657,502 1,611,902 1,130,574 1,850,925 1,342,722 1,077,896 878,523 1,149,895 607,644 615,717 783,677 1,053,567 6,250,902 4,449,037 3,060,606
Product development expenses 331,139 301,746 271,759 330,665 462,965 361,232 760,672 594,209 325,010 290,853 271,858 266,479 1,235,309 2,179,079 1,154,200
Net operating income 461,437 626,850 213,983 820,052 198,856 40,853 (458,667) 12,561 (209,975) (159,967) 23,722 326,666 2,122,322 (206,398) (19,552)
Net income $ 288,807 $ 351,292 $ 94,058 $ 479,082 $ 130,626 $ 10,330 $ (294,781) $ (13,335) $ (150,703) $ 57,336 $ 6,452 $ 204,310 $ 1,213,239 $ (167,159) $ 117,395
Net (loss) income per common share:                              
Basic $ 0.09 $ 0.12 $ 0.03 $ 0.16 $ 0.04 $ 0 $ (0.1) $ 0 $ (0.05) $ 0.02 $ 0 $ 0.07 $ 0.40 $ (0.06) $ 0.04
Diluted $ 0.09 $ 0.11 $ 0.03 $ 0.15 $ 0.04 $ 0 $ (0.1) $ 0 $ (0.05) $ 0.02 $ 0 $ 0.07 $ 0.38 $ (0.06) $ 0.04