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Summary of Significant Accounting Policies - Equipment and Revenue Recognition (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) segment | Dec. 31, 2020 USD ($)
Equipment and leasehold improvements |  |
Number of reportable operating segments | segment | 2 |
Equipment | Minimum |  |
Equipment and leasehold improvements |  |
Useful lives of assets | 3 years |
Equipment | Maximum |  |
Equipment and leasehold improvements |  |
Useful lives of assets | 5 years |
Capitalized software |  |
Equipment and leasehold improvements |  |
Software development costs, gross | $ | $ 0.7 | $ 0.8
Capitalized software | Minimum |  |
Equipment and leasehold improvements |  |
Amortization period | 4 years |
Capitalized software | Maximum |  |
Equipment and leasehold improvements |  |
Amortization period | 7 years |

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- Definition Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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