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Subsequent Events - Additional Information (Details) - USD ($) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2021 | Feb. 12, 2021 | Jan. 31, 2021 | Aug. 31, 2016 | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 31, 2023 | Jan. 13, 2021
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  |  |  | 26,219,019 | 20,936,658 |  |
Proceeds from issuance of preferred and common equity |  |  |  |  |  | $ 130,348,000 | $ 118,357,000 |  |
Redemption of preferred stock |  |  |  |  |  | $ 684,000 | $ 340,000 |  |
Series A Preferred Stock |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate (as percent) |  |  |  | 6.375% |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  |  | $ 0.001 |  | $ 0.001 | $ 0.001 |  |
Weighted-average Offering Price Per Share |  |  |  | $ 25.00 |  |  |  |  |
Proceeds from issuance of preferred and common equity |  |  |  | $ 27,600,000 |  |  |  |  |
Redemption price of redeemable preferred stock (in dollars per share) |  |  |  |  |  | 25.00 |  |  |
Preferred stock, liquidation preference (in dollars per share) |  |  |  |  |  | $ 25.00 | $ 25.00 |  |
Preferred stock, shares authorized (in shares) |  |  |  |  |  | 2,000,000 | 2,000,000 |  |
Series A Preferred Stock | Forecast |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Anticipated write off |  |  |  |  | $ 127,000 |  |  |  |
Series A Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Redemption price of redeemable preferred stock (in dollars per share) |  | $ 25.00 |  |  |  |  |  |  |
Redemption of preferred stock |  | $ 28,800,000 |  |  |  |  |  |  |
Series D Preferred Stock | Forecast |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate (as percent) | 5.00% |  |  |  |  |  |  |  |
Preferred stock, liquidation preference (in dollars per share) | $ 25.00 |  |  |  |  |  |  |  |
Series D Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Preferred stock, dividend rate (as percent) |  |  | 5.00% |  |  |  |  |  |
Preferred stock, par value (in dollars per share) |  |  | $ 0.001 |  |  |  |  |  |
Weighted-average Offering Price Per Share |  |  | $ 25.00 |  |  |  |  |  |
Proceeds from issuance of preferred and common equity |  |  | $ 58,500,000 |  |  |  |  |  |
Redemption price of redeemable preferred stock (in dollars per share) |  |  |  |  |  |  |  | $ 25.00 |
Preferred stock, shares authorized (in shares) |  |  |  |  |  |  |  |  | 3,600,000
Preferred Stock | Series A Preferred Stock |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from issuance and preferred stock |  |  |  | $ 28,800,000 |  | $ 28,800,000 |  |  |
Preferred Stock | Series D Preferred Stock | Subsequent Event |  |  |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  | 2,415,000 |  |  |  |  |  |
Proceeds from issuance and preferred stock |  |  | $ 60,400,000 |  |  |  |  |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The cash outflow to reacquire preferred stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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