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v3.20.2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) | Sep. 30, 2020 | Mar. 31, 2020
--- | --- | ---
Allowance for doubtful accounts | $ 85,419 | $ 62,248
Accumulated depreciation | 4,369,737 | 3,060,681
Convertible promissory notes, issuance costs current | $ 18,278 | $ 237,611
Common stock, par value | $ 0.001 | $ 0.001
Common stock, shares authorized | 200,000,000 | 200,000,000
Common stock, shares issued | 48,324,347 | 46,204,139
Common stock, shares outstanding | 48,324,347 | 46,204,139
Licensing Agreements [Member] |  |
Accumulated amortization | $ 183,333 | $ 158,833
Patents [Member] |  |
Accumulated amortization | 807,766 | 561,096
Other Intangible Assets [Member] |  |
Accumulated amortization | $ 2,211,057 | $ 1,496,833

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