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Common Stock - Summary of Outstanding Warrants (Detail) - $ / shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Warrants Issued In September 2017 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 411 |
Exercise price per Share | $ 699.2000 |
Expiration Date | 2023-03 |
Warrants Issued in June 2018 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 114,100 |
Exercise price per Share | $ 80.0000 |
Expiration Date | 2023-06 |
Warrants Issued in October 2018 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 31,215 |
Exercise price per Share | $ 62.8900 |
Expiration Date | 2023-10 |
Warrants Issued in May 2019 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 60,000 |
Exercise price per Share | $ 90.0000 |
Expiration Date | 2025-05 |
Warrants Issued in December 2019 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 612,967 |
Exercise price per Share | $ 6.6000 | $ 6.60
Expiration Date | 2024-12 |
Warrants Issued in April 2020 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 182,461 |
Exercise price per Share | $ 7.2400 |
Expiration Date | 2025-04 |
Warrants Issued in April 2020 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 24,375 |
Exercise price per Share | $ 7.3200 |
Expiration Date | 2025-04 |
Warrants Issued in April 2020 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 25,270 |
Exercise price per Share | $ 7.5900 |
Expiration Date | 2025-04 |
Pre-Funded Warrants Issued in August 2020 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 142,857 |
Exercise price per Share | $ 0.0010 |
Warrants Issued in December 2020 [Member] |  |
Class of Warrant or Right [Line Items] |  |
Total Outstanding and Exercisable | 50,000 |
Exercise price per Share | $ 8.7500 |
Expiration Date | 2025-12 |

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