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Stockholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 27, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Aug. 31, 2021 | Jul. 31, 2020
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Proceeds from issuance of common stock in at the market offering, net of issuance costs |  | $ 5,921,000 | $ 34,272,000 |  |
Common stock |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Maximum aggregate offering price |  |  |  |  | $ 250,000,000
2020 Open Market Sales Agreement |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Issuance of common stock in at the market offering (shares) |  |  | 4.9 |  |
Proceeds from issuance of common stock in at the market offering, net of issuance costs |  |  | $ 35,000,000 |  |
Weighted-average sales price per share |  |  | $ 7.09 |  |
2020 Open Market Sales Agreement | Common stock |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Maximum aggregate offering price |  |  |  |  | $ 100,000,000
2021 Open Market Sales Agreement |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Commission on sale of stock per agreement (percent) |  | 3.00% |  |  |
Issuance of common stock in at the market offering (shares) |  | 5.9 |  |  |
Proceeds from issuance of common stock in at the market offering, net of issuance costs |  | $ 6,000,000 |  |  |
Weighted-average sales price per share |  | $ 1.02 |  |  |
2021 Open Market Sales Agreement | Common stock |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Maximum aggregate offering price |  |  |  | $ 150,000,000 |
2021 Open Market Sales Agreement | Subsequent event |  |  |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |  |  |
Issuance of common stock in at the market offering (shares) | 8.3 |  |  |  |
Proceeds from issuance of common stock in at the market offering, net of issuance costs | $ 9,000,000 |  |  |  |
Weighted-average sales price per share | $ 1.09 |  |  |  |

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