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Description of Business and Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of cash and cash equivalent and restricted cash

(in thousands)  June 30,
2020		   December 31,
2019		 
Cash and cash equivalents  $53,466   $9,254 
Restricted cash – current   48    48 
Restricted cash – long-term   391    391 
Cash, cash equivalents and restricted cash  $53,905   $9,693 
Schedule of antidilutive securities excluded from computation of diluted net loss per share

(in thousands)  June 30,
2020		   June 30,
2019		 
Options   365    264 
Warrants   2,871    2,878 
Total   3,236    3,142