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Note A - The Company and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
 
 
December 31,
 
 
 
2016
 
 
2015
 
                 
Accounts receivable - current
  $
1,577,031
    $
3,405,190
 
Accounts receivable - non current
   
2,070,000
     
-
 
     
3,647,031
     
3,405,190
 
Allowance for doubtful accounts - current
   
(13,785
)
   
(13,785
)
Allowance for doubtful accounts - non current
   
(500,000
)
   
-
 
                 
                 
Accounts receivable, net of allowances for doubtful accounts
  $
3,133,246
    $
3,391,405
 
Summary of Valuation Allowance [Table Text Block]
   
Balance at
Beginning
of Year
   
Charged to
Costs
and
Expenses
   
Deductions
From
Reserves
   
Balance at
End of Year
 
Year Ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
  $
13,785
    $
500,000
    $
-
    $
513,785
 
Year Ended December 31, 2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
  $
20,526
    $
-
    $
(6,741
)
  $
13,785
 
Useful Lives of Property Plan and Equipment [Table Text Block]
   
Years
 
Equipment and leasehold improvements
 
 
 
 
 
Equipment (years)
 
 3
-
5
 
Furniture and fixtures (years)
 
 3
-
 
Software (years)
 
 
3
 
 
Leasehold improvements
 
 
life or lease term
 
 
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
 
 
Year ended
December 31,
 
 
 
2016
 
 
2015
 
                 
Selling, general and administrative
  $
265,555
    $
202,073
 
Research, development and engineering
   
74,786
     
139,042
 
    $
340,341
    $
341,115
 
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
 
 
Year ended
December 31,
 
 
 
2016
 
 
2015
 
Weighted average Risk free interest rate
   
1.11
%
   
1.46
%
Expected life of options (in years)
   
4.5
     
4.5
 
Expected dividends
   
0
%
   
0
%
Weighted average Volatility of stock price
   
93
%
   
117
%