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7. INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2019
Income Tax Disclosure [Abstract]  
Reconciliation of expected income tax at the statutory federal rate with the actual income tax provision
    2019     2018  
Expected income tax benefit at statutory rate (34%)   $ (338 )   $ (434 )
State taxes, net of federal tax benefit     (80 )     (101 )
Effect of change in valuation allowance     (2,110 )     (1,256 )
Non-deductible expenses     1       1  
Expired net operating loss carryforwards     2,527       1,386  
Expired employee stock options     --       404  
Impact of tax rate change     --       --  
Total   $ --     $ --  
Net deferred tax asset (liability)
    2019     2018  
             
Accrued expenses, non-tax deductible   $ 1     $ 5  
Deferred revenue     56       119  
Contingent payments     (538 )     (538 )
Stock compensation expense     --       --  
Loss carryforwards     35,125       37,125  
Depreciation and amortization     846       889  
      35,490       37,600  
                 
Less: valuation allowance     (35,490 )     (37,600 )
                 
    $ --     $ --