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Condensed Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Income Statement [Abstract]        
Revenues $ 2,715,024 $ 5,060,105 $ 6,935,710 $ 9,688,696
Cost of revenues 1,353,498 2,430,464 3,350,469 4,659,213
Gross profit 1,361,526 2,629,641 3,585,241 5,029,483
Operating expenses:        
Research and development 859,510 997,483 1,740,148 1,891,219
Sales and marketing 722,160 771,097 1,489,956 1,527,011
General and administrative 589,730 643,215 1,255,846 1,346,397
Total operating expenses 2,171,400 2,411,795 4,485,950 4,764,627
Operating income (loss) (809,874) 217,846 (900,709) 264,856
Interest expense, net (8,149) (29,307) (27,641) (57,808)
Other income 50,000 70,000
Net income (loss) before income taxes (768,023) 188,539 (858,350) 207,048
Income tax expense (68,749) (75,419)
Net income (loss) $ (768,023) $ 119,790 $ (858,350) $ 131,629
Net income (loss) per share:        
Basic $ (0.13) $ 0.02 $ (0.14) $ 0.02
Diluted $ (0.13) $ 0.02 $ (0.14) $ 0.02
Weighted average shares outstanding:        
Basic 6,009,383 5,999,159 6,011,670 5,969,666
Diluted 6,009,383 6,271,507 6,011,670 6,203,889