Investments (Details) - Schedule of financial assets measured at fair value on a recurring basis - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Available-for-sales securities—current:
Total	$ 17,888	$ 17,884
U.S. Treasury securities [Member]
Available-for-sales securities—current:
Available-for-sale securities - current	14,751	14,748
Level 1 [Member]
Available-for-sales securities—current:
Total	3,137	3,136
Level 1 [Member] | U.S. Treasury securities [Member]
Available-for-sales securities—current:
Available-for-sale securities - current
Level 2 [Member]
Available-for-sales securities—current:
Total	14,751	14,748
Level 2 [Member] | U.S. Treasury securities [Member]
Available-for-sales securities—current:
Available-for-sale securities - current	14,751	14,748
Level 3 [Member]
Available-for-sales securities—current:
Total
Level 3 [Member] | U.S. Treasury securities [Member]
Available-for-sales securities—current:
Available-for-sale securities - current
Money market funds [Member]
Cash equivalents:
Cash equivalents	3,137	3,136
Money market funds [Member] | Level 1 [Member]
Cash equivalents:
Cash equivalents	3,137	3,136
Money market funds [Member] | Level 2 [Member]
Cash equivalents:
Cash equivalents
Money market funds [Member] | Level 3 [Member]
Cash equivalents:
Cash equivalents