Stock Based Compensation - Summary of Stock-based Compensation Reflected within Statements of Operations (Detail) - USD ($) |
12 Months Ended | |
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Dec. 31, 2019 |
Dec. 31, 2018 |
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Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
Share-based Compensation, Total | $ 10,646,580 | $ 16,753,754 |
Research and Development Expense [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
Allocated share-based compensation expense | 5,419,627 | 9,676,156 |
Selling and Marketing Expense [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
Allocated share-based compensation expense | 1,561,319 | 1,416,136 |
General and Administrative Expense [Member] | ||
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
Allocated share-based compensation expense | $ 3,665,634 | $ 5,661,462 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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