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Common Stock - Common Stock Warrants - Additional Information (Detail) - USD ($) | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Class of Warrant or Right [Line Items] |  |
Proceeds from exercise of warrants | $ 339,000 | $ 3,080,000
Warrants Issued in December 2019 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Warrants to purchase common stock | 47,084 | 467,126
Exercise price per unit of warrant | $ 6.600 | $ 6.60
Proceeds from exercise of warrants | $ 300,000 | $ 3,100,000
Warrants Issued in April 2020 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Warrants to purchase common stock | 3,750 |
Exercise price per unit of warrant | $ 7.32 |
Proceeds from exercise of warrants | $ 27,450 |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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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. + References No definition available. + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21475-112644 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock warrants. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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