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Investments - Investments consists of available-for-sale securities (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2021 USD ($)
Short Term Marketable Securities [Member] |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | $ 83,208
Unrealized Loss | 9
Estimated Fair Value | 83,199
Long Term Marketable Securities [Member] |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 23,628
Unrealized Loss | 9
Estimated Fair Value | 23,619
US Government Debt Securities [Member] | Long Term Marketable Securities [Member] |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 3,995
Estimated Fair Value | 3,995
Corporate Bonds [Member] | Short Term Marketable Securities [Member] |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 83,208
Unrealized Loss | 9
Estimated Fair Value | 83,199
Corporate Bonds [Member] | Long Term Marketable Securities [Member] |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 19,633
Unrealized Loss | 9
Estimated Fair Value | $ 19,624

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of unrealized loss before deducting unrealized gain on investments in available-for-sale securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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