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Organization and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Schedule of components of inventories
               
    As of December 31,  
    2022     2021  
Raw materials and supplies   $ 60     $ 227  
Finished goods     46       66  
 Total inventories   $ 106     $ 293  
Schedule of activity related to our accounts receivable
Schedule of restricted cash        
   2022   2021 
Cash and cash equivalents  $2,937   $6,037 
Restricted cash   196    295 
Cash, cash equivalents and restricted cash as shown in the statements of cash flows  $3,133   $6,332 

 

Schedule of activity related to our accounts receivable
       
(In thousands)      
Balance at January 1, 2021   $ 884  
Additions     1,526  
Deductions     (2,298 )
Balance at December 31, 2021   $ 112  
Additions     557  
Deductions     (633 )
Balance at December 31, 2022   $ 36  
Schedule of anti-dilutive effect
               
    December 31,  
    2022     2021  
Weighted-average anti-dilutive common shares resulting from stock awards     964       617  
Weighted-average anti-dilutive common shares resulting from warrants     5,661       2,374  
      6,625       2,991  
Schedule of minimum operating lease payments
       
2023     130  
2024     66  
Total minimum lease payments (base rent)     196  
Less: imputed interest     (9 )
Total operating lease liabilities   $ 187