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Prepaid Expenses and Other Current Assets
12 Months Ended
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid and Other Current Assets PREPAID AND OTHER CURRENT ASSETS
 
Prepaid and other current assets consisted of the following (in thousands):
 
 At December 31,
 20202019
Prepaid insurance$126 $140 
Prepaid expenses233 133 
Prepaid rent80 70 
Restricted cash342 — 
Other10 
Total prepaid and other current assets$782 353