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10. Income Taxes (Tables)
12 Months Ended
Dec. 31, 2017
Income Tax Disclosure [Abstract]  
Reconciliation of income tax provision
   December 31, 
   2017   2016 
Computed tax provision (benefit) at federal statutory rate (34%)  $(546,000)  $(593,000)
State income taxes, net of federal benefit (8.84%)   (142,000)   (154,000)
Valuation allowance   689,600    748,600 
Income tax provision  $1,600   $1,600 
Net operating loss carryforwards
   December 31, 
   2017   2016 
Net operating loss carry forwards  $14,746,000   $21,552,000 
Stock based compensation   (249,000)   (181,000)
Non-cash interest and financing expenses   (480,000)   (663,000)
Other temporary differences   (176,000)   (81,000)
Valuation allowance   (13,841,000)   (20,627,000)
Total deferred taxes net of valuation allowance  $   $