Quarterly report pursuant to Section 13 or 15(d)

Unaudited Condensed Statements of Operations

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Unaudited Condensed Statements of Operations - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income Statement [Abstract]        
Sales $ 15,786,913 $ 12,448,436 $ 44,063,692 $ 36,713,996
Cost of goods sold 8,921,571 6,444,544 24,402,658 19,300,120
Gross profit 6,865,342 6,003,892 19,661,034 17,413,876
Operating expenses:        
Research and development 2,474,653 2,094,774 7,162,092 5,510,861
Sales and marketing 2,161,143 1,809,037 9,140,356 5,229,188
General and administrative 1,922,326 1,899,449 7,864,320 6,174,869
Total operating expenses 6,558,122 5,803,260 24,166,768 16,914,918
Income (loss) from operations 307,220 200,632 (4,505,734) 498,958
Other expense (income):        
Interest income (158,790) (98,689) (398,003) (189,855)
Gain on deferred purchase price liability     (388,733)  
Interest expense 5,756 22,762 29,506 80,239
Total other income (153,034) (75,927) (757,230) (109,616)
Income (loss) before income taxes 460,254 276,559 (3,748,504) 608,574
Provision for income taxes 22,995 42,206 110,375 59,251
Net income (loss) $ 437,259 $ 234,353 $ (3,858,879) $ 549,323
Net income (loss) per share:        
Basic $ 0.05 $ 0.02 $ (0.41) $ 0.06
Diluted $ 0.04 $ 0.02 $ (0.41) $ 0.05
Weighted average shares used in calculating income (loss) per share:        
Basic 9,566,118 9,545,235 9,495,278 9,475,708
Diluted 10,092,501 10,169,559 9,495,278 10,238,987