Fair Value Measurements (Details 1) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Fair Value
Cash and Cash Equivalents	$ 21,450	$ 64,065
Debt Securities, Available-for-Sale, Current	40,518
Short-term Investments		22,678
Total Cash and Cash Equivalents and Investments	61,968	86,743
Fair Value, Level 1
Fair Value
Cash and Cash Equivalents	21,450	64,065
Debt Securities, Available-for-Sale, Current	30,330
Short-term Investments		7,561
Total Cash and Cash Equivalents and Investments	51,780	71,626
Fair Value, Level 2
Fair Value
Cash and Cash Equivalents	0	0
Debt Securities, Available-for-Sale, Current	10,188
Short-term Investments		15,117
Total Cash and Cash Equivalents and Investments	10,188	15,117
Fair Value, Level 3
Fair Value
Cash and Cash Equivalents	0	0
Debt Securities, Available-for-Sale, Current	0
Short-term Investments		0
Total Cash and Cash Equivalents and Investments	$ 0	$ 0