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Consolidated Statements of Comprehensive Income (unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Consolidated Statements Of Comprehensive Income        
Sales, net $ 5,869,837 $ 4,236,331 $ 10,870,066 $ 8,426,661
Cost of sales 2,573,380 1,876,331 4,739,861 3,815,093
Gross margin 3,296,457 2,360,000 6,130,205 4,611,568
Operating expenses:        
Selling, general and administrative 1,695,881 1,571,321 3,860,943 3,009,913
New product development 267,527 168,067 545,545 316,413
Loss on disposal of property and equipment   11,876   11,876
Total costs and expenses 1,963,408 1,751,264 4,406,488 3,338,202
Operating income 1,333,049 608,736 1,723,717 1,273,366
Other income (expense)        
Interest expense (6,252) (8,942) (13,193) (21,813)
Change in fair value of warrant liability 246,885 (1,055,179) 290,385 (687,065)
Other income (expense) (235,389) (78,170) (256,920) (253,014)
Total other income (expense), net 5,244 (1,142,291) 20,272 (961,892)
Net income before income taxes 1,338,293 (533,555) 1,743,989 311,474
Income taxes 240,626 2,028 505,826 4,084
Net income $ 1,097,667 $ (535,583) $ 1,238,163 $ 307,390
Earnings (loss) per common share (basic) $ 0.07 $ (0.04) $ 0.08 $ 0.02
Number of shares used in per share calculation (basic) 16,541,205 15,250,146 16,079,030 15,244,747
Earnings (loss) per common share (diluted) $ 0.06 $ (0.04) $ 0.07 $ 0.02
Number of shares used in per share calculation (diluted) 17,902,712 15,250,146 17,523,734 16,594,759
Foreign currency translation adjustment $ 43,629 $ 8,848 $ 75,182 $ 20,923
Comprehensive income $ 1,141,296 $ (526,735) $ 1,313,345 $ 328,313