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Summary of Significant Accounting Policies - Leases (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2019
--- | --- | --- | ---
Right-of-use assets | $ 2,970 | $ 3,449 |
Lease liabilities | 3,042 |  |
ASC 842 |  |  |
Right-of-use assets | 1,000 | 1,900 |
Lease liabilities | $ 1,000 | $ 1,900 | $ 1,400
Term of lease (in years) |  |  | 3 years
Minimum |  |  |
Term of lease (in years) | 1 year |  |
Maximum |  |  |
Term of lease (in years) | 4 years |  |

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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