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Cash and Cash Equivalents and Investments (Details 1) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value
Debt Securities, Available-for-Sale, Current	$ 40,518
Cash and Cash Equivalents
Fair Value
Gross Unrealized Gains		$ 0
Gross Unrealized Losses		(1)
Estimated Fair Value		64,065
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0
Debt Securities, Available-for-Sale, Amortized Cost, Current	21,450	64,066
Debt Securities, Available-for-Sale, Current	21,450
U.S. Treasury Securities
Fair Value
Estimated Fair Value		7,561
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	89	1
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Amortized Cost, Current	30,419	7,562
Debt Securities, Available-for-Sale, Current	30,330
Total Short-term Investments
Fair Value
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	150	9
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Amortized Cost, Current	40,668	22,687
Debt Securities, Available-for-Sale, Current	40,518	22,678
Total Cash and Cash Equivalents and Investments
Fair Value
Gross Unrealized Gains		0
Gross Unrealized Losses		(10)
Estimated Fair Value		86,743
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	150
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0
Debt Securities, Available-for-Sale, Amortized Cost, Current	62,118	86,753
Debt Securities, Available-for-Sale, Current	61,968
Corporate Debt Securities
Fair Value
Estimated Fair Value		15,117
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax	61	8
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	0	0
Debt Securities, Available-for-Sale, Amortized Cost, Current	10,249	$ 15,125
Debt Securities, Available-for-Sale, Current	$ 10,188

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