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Note R - Commitments and Other (Details Textual)
1 Months Ended 12 Months Ended
Oct. 02, 2017
USD ($)
$ / shares
shares
Jan. 01, 2005
shares
Mar. 31, 2018
USD ($)
Feb. 28, 2018
USD ($)
Dec. 31, 2017
USD ($)
ft²
Dec. 31, 2016
USD ($)
Area of Office Space | ft²         7,625  
Operating Leases, Rent Expense, Minimum Rentals         $ 12,522  
Operating Leases, Rent Expense         141,428 $ 133,657
Payments for Postemployment Benefits         $ 203,111 203,111
Define Benefit Plan, Payment Period         5 years  
Additional Percentage of Director Compensation on Sales Value Using Certain Specify Technology   2.50%        
Additional Percentage of Director Compensation Sales Value Using Other Kind of Technology   5.00%        
Consulting Services [Member]            
Related Party Transaction, Expenses from Transactions with Related Party         $ 100,000 100,000
Innovest S.p.A. [Member] | Consulting Services [Member]            
Related Party Transaction, Expenses from Transactions with Related Party         80,000  
Director of Clinical Affairs [Member]            
Stock Issued During Period, Shares, Stock Options Exercised, Attributable to Consultants | shares   8,333        
Royalty Expense         554,150 526,737
Professional Fees         $ 275,000 $ 275,000
Former CEO [Member]            
Employee Resignation Assertion, Basic Salary for One Year $ 300,000          
Employee Resignation Assertion, Health and Disability Insurance for One Year 30,000          
Employee Resignation Assertion, Car Allowance for One Year $ 1,200          
Employee Resignation Assertion, Vesting Term After Resignation 90 days          
Employee Resignation Assertion, Number of Options Vested | shares 921,942          
Employee Resignation Assertion, Options Exercise Price | $ / shares $ 2          
Former CEO [Member] | Subsequent Event [Member]            
Employee Resignation Assertion, Gross Settlement       $ 175,000    
Employee Resignation Assertion, Payment     $ 75,000