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Stockholders' Equity - Additional Information (Detail) - USD ($) | 1 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2020 | Mar. 31, 2022 | Sep. 30, 2021
Class Of Stock [Line Items] |  |  |
Capital stock authorized for issuance |  | 150,000,000 |
Common stock, shares authorized |  | 145,000,000 | 145,000,000
Common stock, par value |  | $ 0.001 | $ 0.001
Preferred stock, shares authorized |  | 5,000,000 |
Preferred stock, par value |  | $ 0.001 |
Common stock, shares outstanding |  | 105,702,499 | 104,327,000
At The Market Agreement |  |  |
Class Of Stock [Line Items] |  |  |
Shares issued to institutional investors |  | 0 |
At The Market Agreement | Maximum |  |  |
Class Of Stock [Line Items] |  |  |
Common stock shares value reserved for future issuance | $ 250,000,000 |  |
Percentage of commission to sales agent | 3.00% |  |
2004 Equity Incentive Plan, 2013 Equity Incentive Plan, 2021 Equity Incentive Plan and Inducement Grants |  |  |
Class Of Stock [Line Items] |  |  |
Common Stock, Share reserve for issuance |  | 14,054,083 |

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