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Cash and Cash Equivalents and Investments (Details 1) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Cash and Cash Equivalents |  |
Fair Value |  |
Amortized Cost | $ 59,520 | $ 64,066
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 1
Estimated Fair Value | 59,520 | 64,065
U.S. Treasury Securities |  |
Fair Value |  |
Amortized Cost | 12,486 | 7,562
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (26) | (1)
Estimated Fair Value | 12,460 | 7,561
Total Short-term Investments |  |
Fair Value |  |
Amortized Cost | 27,019 | 22,687
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | (41) | (9)
Estimated Fair Value | 26,982 | 22,678
Total Cash and Cash Equivalents and Investments |  |
Fair Value |  |
Amortized Cost | 86,539 | 86,753
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | (41) | (10)
Estimated Fair Value | 86,502 | 86,743
Corporate Debt Securities |  |
Fair Value |  |
Amortized Cost | 14,533 | 15,125
Gross Unrealized Gains | 4 | 0
Gross Unrealized Losses | (15) | (8)
Estimated Fair Value | $ 14,522 | $ 15,117

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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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