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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of deferred tax assets and liabilities
          
   December 31
   2021  2020
       
Net operating loss carryforwards  $22,497   $19,965 
Net operating loss carryforwards of foreign subsidiaries   56    374 
Depreciation expense   (94)   (99)
Stock-based compensation expense   52    53 
Other   544    304 
Net deferred tax assets   23,055    20,597 
Valuation allowance for net deferred tax assets   (23,055)   (20,597)
Net deferred tax assets, net of allowance  $   $ 
Schedule of effective income tax rate reconciliation
          
   2021  2020
       
Reconciliation of income tax benefit to statutory rate:          
Income benefit at statutory rate  $(3,948)  $(1,369)
State income taxes (benefit), net of federal income tax benefit   (331)   (121)
Permanent differences   (206)   60 
Change in valuation allowance   2,458    1,425 
Other   2,027    5 
 Income tax provision  $   $