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Statements of Operations (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Revenue:    
Total revenue $ 8,622,558 $ 5,756,241
Sublease 246,530 246,530
Cost of revenue:    
Total cost of revenue 2,606,683 951,415
Sublease 246,530 246,530
Gross margin 6,015,875 4,804,826
Operating expenses:    
Research and development 2,367,041 2,109,170
Sales and marketing 2,947,216 2,915,424
General and administrative 2,229,739 1,832,726
Total operating expenses 7,543,996 6,857,320
Operating loss (1,528,121) (2,052,494)
Interest (expense) income, net (4,276) 80,963
Net loss (1,532,397) (1,971,531)
Cumulative dividend on Series A convertible preferred stock (332,551) (343,723)
Loss attributable to common stockholders $ (1,864,948) $ (2,315,254)
Net loss per share attributable to common stockholders:    
Basic $ (0.02) $ (0.03)
Diluted $ (0.02) $ (0.03)
Weighted average number of common shares and equivalents:    
Basic 75,175,412 69,870,040
Diluted 75,175,412 69,870,040
Systems [Member]    
Revenue:    
Total revenue $ 2,602,512
Cost of revenue:    
Total cost of revenue 1,435,535 65,022
Disposables, Service and Accessories [Member]    
Revenue:    
Total revenue 5,773,516 5,509,711
Cost of revenue:    
Total cost of revenue $ 924,618 $ 639,863