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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

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