Fair Value Measurements (Details 1) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value
Cash and Cash Equivalents	$ 59,520	$ 64,065
Short-term Investments	26,982	22,678
Total Cash and Cash Equivalents and Investments	86,502	86,743
Fair Value, Level 1
Fair Value
Cash and Cash Equivalents	59,520	64,065
Short-term Investments	12,460	7,561
Total Cash and Cash Equivalents and Investments	71,980	71,626
Fair Value, Level 2
Fair Value
Cash and Cash Equivalents	0	0
Short-term Investments	14,522	15,117
Total Cash and Cash Equivalents and Investments	14,522	15,117
Fair Value, Level 3
Fair Value
Cash and Cash Equivalents	0	0
Short-term Investments	0	0
Total Cash and Cash Equivalents and Investments	$ 0	$ 0