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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
Revenues:        
Revenues $ 10,191,691 $ 7,868,448 $ 20,369,250 $ 15,497,015
Cost of revenues 5,001,183 3,832,468 10,089,484 7,503,494
Gross Profit 5,190,508 4,035,980 10,279,766 7,993,521
Operating expenses        
Selling, general and administrative 2,475,378 2,517,891 5,226,386 4,706,289
Research and development 1,279,744 913,935 2,328,119 1,691,972
Total operating expenses 3,755,122 3,431,826 7,554,505 6,398,261
Income from operations 1,435,386 604,154 2,725,261 1,595,260
Other income and expense, net 17,608 15,205 56,676 49,735
Income from operations before income taxes 1,452,994 619,359 2,781,937 1,644,995
Income tax expense 274,144 158,451 557,147 2,867,339
Net income (loss) $ 1,178,850 $ 460,908 $ 2,224,790 $ (1,222,344)
Basic income (loss) per share (in dollars per share) $ 0.04 $ 0.01 $ 0.07 $ (0.04)
Diluted income (loss) per share (in dollars per share) $ 0.04 $ 0.01 $ 0.07 $ (0.04)
Weighted average common shares outstanding:        
Basic (in shares) 32,584,952 32,275,647 32,738,871 32,212,286
Diluted (in shares) 33,077,255 33,299,206 33,272,164 32,212,286
Product [Member]        
Revenues:        
Revenues $ 9,340,523 $ 7,125,258 $ 18,688,691 $ 14,461,283
Service [Member]        
Revenues:        
Revenues $ 851,168 $ 743,190 $ 1,680,559 $ 1,035,732