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Investments - Debt Securities and Other Investments, Included on Condensed Consolidated Balance Sheet and Recorded at Fair Value (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 9,541 | $ 9,671
Gross Unrealized Gains | 11 | 9
Gross Unrealized Losses | (339) | (427)
Fair Value | 9,213 | 9,253
Corporate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 2,218 | 2,538
Gross Unrealized Gains | 4 | 5
Gross Unrealized Losses | (63) | (81)
Fair Value | 2,159 | 2,462
Municipal Fixed-Rate Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 185 | 185
Gross Unrealized Losses | (4) | (5)
Fair Value | 181 | 180
Asset-Backed Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 734 | 818
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | (20) | (24)
Fair Value | 715 | 795
Mortgage/Agency-Backed Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 1,699 | 1,853
Gross Unrealized Gains | 1 |
Gross Unrealized Losses | (82) | (105)
Fair Value | 1,618 | 1,748
U.S. Government Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 4,299 | 3,870
Gross Unrealized Gains | 5 | 3
Gross Unrealized Losses | (151) | (188)
Fair Value | 4,153 | 3,685
Foreign Government Bonds [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 406 | 407
Gross Unrealized Losses | (19) | (24)
Fair Value | $ 387 | $ 383

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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 https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Amount, before tax, of unrealized loss 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 (c) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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