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Supplementary Balance Sheet Information - Investments Available-for-sale (Details) $ in Thousands | Sep. 30, 2021 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | $ 120,866
Gross Unrealized Gains | 25
Gross Unrealized Losses | (9)
Fair Market Value | 120,882
Certificate of deposit |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 2,609
Gross Unrealized Gains | 1
Gross Unrealized Losses | 0
Fair Market Value | 2,610
Corporate debt securities |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 77,901
Gross Unrealized Gains | 15
Gross Unrealized Losses | (6)
Fair Market Value | 77,910
Commercial paper |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 12,434
Gross Unrealized Gains | 4
Gross Unrealized Losses | (2)
Fair Market Value | 12,436
Non U.S. government |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 732
Gross Unrealized Gains | 0
Gross Unrealized Losses | 0
Fair Market Value | 732
U.S. treasury securities |
Debt Securities, Available-for-sale [Line Items] |
Amortized Cost | 27,190
Gross Unrealized Gains | 5
Gross Unrealized Losses | (1)
Fair Market Value | $ 27,194

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + 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 (b) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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