Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Instruments (Details)

v3.21.1
Summary of Significant Accounting Policies - Schedule of Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Fair value of marketable debt securities $ 1,639 $ 926
Level 1 [Member]    
Fair value of marketable debt securities
Level 2 [Member]    
Fair value of marketable debt securities 1,639 926
Level 3 [Member]    
Fair value of marketable debt securities
U.S. Government Obligations [Member]    
Fair value of marketable debt securities 1,014 125
U.S. Government Obligations [Member] | Level 1 [Member]    
Fair value of marketable debt securities
U.S. Government Obligations [Member] | Level 2 [Member]    
Fair value of marketable debt securities 1,014 125
U.S. Government Obligations [Member] | Level 3 [Member]    
Fair value of marketable debt securities
Corporate Obligations [Member]    
Fair value of marketable debt securities 625 801
Corporate Obligations [Member] | Level 1 [Member]    
Fair value of marketable debt securities
Corporate Obligations [Member] | Level 2 [Member]    
Fair value of marketable debt securities 625 801
Corporate Obligations [Member] | Level 3 [Member]    
Fair value of marketable debt securities