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v3.20.2

Description of Business and Significant Accounting Policies (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 USD ($) segment financial_institution | Sep. 30, 2019 USD ($) | Dec. 31, 2019 financial_institution
Schedule of Accounting Policies [Line Items] |  |  |
Renewal term | 1 year |  |
Number of reportable segments | segment | 2 |  |
Amortization period of inventories and supplies | 24 months |  |
Goodwill and intangible asset impairment | $ | $ 0 | $ 0 |
Number of financial institutions holding cash and cash equivalents and marketable securities | financial_institution | 1 |  | 1
Minimum |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Cancellation notice period | 30 days |  |
Initial period preceding cancellation notice | 60 days |  |
Typical maturity | 1 year |  |
Maximum |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Cancellation notice period | 90 days |  |
Initial period preceding cancellation notice | 120 days |  |
Typical maturity | 3 years |  |

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- Definition Concentration Risk, Number of Financial Institutions Holding Cash and Cash Equivalents and Marketable Securities + References No definition available. + Details
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- Definition [Line Items] for Schedule of Accounting Policies [Table] + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599 + Details
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