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Description of Business and Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Schedule of cash and cash equivalent and restricted cash
(in thousands)  December 31,
2021		   December 31,
2020		 
Cash and cash equivalents  $77,829   $63,560 
Restricted cash – current   392    48 
Restricted cash – long-term   

-

    391 
Cash, cash equivalents and restricted cash  $78,221   $63,999 

 
Schedule of antidilutive securities excluded from computation of diluted net loss per share
(in thousands)  December 31,
2021		   December 31,
2020		 
Options   1,362    815 
Warrants   2,112    2,113 
Total   3,474    2,928