Fair Value - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Marketable securities	$ 15,980
Redeemable warrants	177	$ 57
Mutual Fund [Member]
Marketable securities		7,308
Level 1 [Member]
Marketable securities	15,980
Redeemable warrants
Level 1 [Member] | Mutual Fund [Member]
Marketable securities		7,308
Level 2 [Member]
Marketable securities
Redeemable warrants
Level 2 [Member] | Mutual Fund [Member]
Marketable securities
Level 3 [Member]
Marketable securities
Redeemable warrants	177	57
Level 3 [Member] | Mutual Fund [Member]
Marketable securities
US Treasury Notes [Member]
Marketable securities	5,618
US Treasury Notes [Member] | Level 1 [Member]
Marketable securities	5,618
US Treasury Notes [Member] | Level 2 [Member]
Marketable securities
US Treasury Notes [Member] | Level 3 [Member]
Marketable securities
U.S. Government Mortgage Backed Securities [Member]
Marketable securities	4,721
U.S. Government Mortgage Backed Securities [Member] | Level 1 [Member]
Marketable securities	4,721
U.S. Government Mortgage Backed Securities [Member] | Level 2 [Member]
Marketable securities
U.S. Government Mortgage Backed Securities [Member] | Level 3 [Member]
Marketable securities
Corporate Bonds [Member]
Marketable securities	5,641
Corporate Bonds [Member] | Level 1 [Member]
Marketable securities	5,641
Corporate Bonds [Member] | Level 2 [Member]
Marketable securities
Corporate Bonds [Member] | Level 3 [Member]
Marketable securities