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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Deferred Tax Assets

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets at December 31, 2021 and 2020 are presented below:

 

   2021   2020 
Deferred tax assets:          
Depreciation  $106,000   $117,000 
Allowance for bad debts   218,000    202,000 
Net operating loss carryforwards   14,114,000    14,755,000 
Stock option expense   355,000    403,000 
Research and other credits   945,000    952,000 
Other temporary differences   15,000    15,000 
Total gross deferred tax assets   15,753,000    16,444,000 
Less valuation allowance   (15,753,000)   (16,444,000)
Deferred tax assets, net  $-   $- 
Schedule of Reconciliation Income Tax Expenses Benefit

The reconciliation of the income tax expense (benefit) computed at the federal statutory tax rates to income tax expense (benefit) is as follows:

 

   2021   2020 
         
Income tax provision at federal statutory rate  $(388,000)  $(485,000)
Permanent differences   -    (43,000)
Expired carryforwards and other   1,079,000    1,211,000 
Valuation allowance   (691,000)   (683,000)
Total income tax provision  $-   $-