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Cash and Cash Equivalents and Investments (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Cash and Cash Equivalents |  |
Realized Investment Gains (Losses) | $ 0 |
Available-for-sale Securities, Amortized Cost Basis | 15,125 |
Available-for-sale Securities, Gross Unrealized Gain Accumulated in Investments | 0 |
Available-for-sale Securities, Gross Unrealized Losses | (8) |
Available-for-sale Securities, Current | 15,117 |
Cash |  |
Cash and Cash Equivalents |  |
Available-for-sale Securities, Amortized Cost Basis | 64,066 | $ 126,263
Available-for-sale Securities, Gross Unrealized Gain Accumulated in Investments | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 1 | 0
Available-for-sale Securities, Current | 64,065 | 126,263
US Treasury Securities |  |
Cash and Cash Equivalents |  |
Available-for-sale Securities, Amortized Cost Basis | 7,562 |
Available-for-sale Securities, Gross Unrealized Gain Accumulated in Investments | 0 |
Available-for-sale Securities, Gross Unrealized Losses | (1) |
Available-for-sale Securities, Current | 7,561 | 26,012
Short-term Investments |  |
Cash and Cash Equivalents |  |
Available-for-sale Securities, Amortized Cost Basis | 22,687 | 26,018
Available-for-sale Securities, Gross Unrealized Gain Accumulated in Investments | 0 | 5
Available-for-sale Securities, Gross Unrealized Losses | (9) | (11)
Available-for-sale Securities, Current | 22,678 | 26,012
Cash and Cash Equivalents and Investments |  |
Cash and Cash Equivalents |  |
Available-for-sale Securities, Amortized Cost Basis | 86,753 | 152,281
Available-for-sale Securities, Gross Unrealized Gain Accumulated in Investments | 0 | 5
Available-for-sale Securities, Gross Unrealized Losses | (10) | (11)
Available-for-sale Securities, Current | $ 86,743 | $ 152,275

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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as 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=123581744&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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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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- Definition Amount of realized gain (loss) on investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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