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Balance Sheet Components - Summary of Platform Development Cost Activity (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Stock-based compensation | $ 3,560,120 | $ 1,319,627 |
Platform Development [Member] |  |  |
Platform development beginning of period | 10,678,692 | $ 6,833,900 | $ 6,833,900
Payroll-based costs capitalized during the period | 853,926 |  | 2,537,402
Total capitalized costs | 11,532,618 |  | 9,371,302
Stock-based compensation | 370,052 |  | 1,307,390
Platform development end of period | $ 11,902,670 |  | $ 10,678,692

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