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Stock Based Compensation - Narrative (Details) - USD ($) |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 01, 2019 | Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of stock options outstanding (in shares) |  | 107,500 |  | 107,500 | 215,345
Options, intrinsic value, vested |  | $ 0 |  |  |
Stock option compensation expense |  | 0 | $ 0 |  |
Unrecognized stock-based compensation expense for stock options |  | $ 0 |  |  |
Stock options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of options granted (in shares) |  | 0 |  | 0 |
Restricted stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unvested restricted shares outstanding (in shares) |  | 627 | 627 |  |
Weighted average price of shares (in dollars per share) |  | $ 15.80 | $ 15.80 |  |
Vesting period |  | 10 years |  |  |
Award service period |  | 5 years |  |  |
Unrecognized stock-based compensation expense for other than options |  | $ 0 | $ 0 |  |
RSUs |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unvested restricted shares outstanding (in shares) |  | 0 | 23,334 |  |
Stock option compensation expense |  | $ 0 | $ 6,000 |  |
Weighted average price of shares (in dollars per share) |  |  | $ 2.20 |  |
Unrecognized stock-based compensation expense for other than options |  | $ 0 |  |  |
Stock-based compensation arrangement, vested in period, remain outstanding (in shares) |  | 28,904 |  |  |
Series D Preferred Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Forfeited, restricted shares (in shares) |  | 81 |  | 28,618 |
Series D Preferred Stock | Restricted stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Unvested restricted shares outstanding (in shares) |  | 0 |  |  |
Stock option compensation expense |  | $ 33,000 | $ 158,000 |  |
Vesting period | 2 years |  |  |  |
Unrecognized stock-based compensation expense for other than options |  | $ 0 |  |  |
Forfeited, restricted shares (in shares) |  | 81 | 14,441 |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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