Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Significant Accounting Policies and Basis of Presentation (Details Textual)

v3.19.2
Note 2 - Significant Accounting Policies and Basis of Presentation (Details Textual) - USD ($)
shares in Millions
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jan. 01, 2019
Cost Reimbursements from SBIR Grant as Offset to Research and Development Expenses $ 280,000 $ 175,000  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0.6 0.5  
Lessee, Operating Lease, Liability, Payments, Due, Total $ 19,800    
Operating Lease, Payments $ 59,500    
Lessee, Operating Lease, Discount Rate 12.75%    
Operating Leases, Rent Expense, Net, Total $ 117,900 $ 108,300  
Operating Leases, Rent Expense, Sublease Rentals 27,100    
Sublease Income 59,100    
Accounting Standards Update 2016-02 [Member]      
Operating Lease, Right-of-Use Asset     $ 53,000
Operating Lease, Liability, Total     $ 75,700
Short-term Leases [Member]      
Operating Leases, Rent Expense, Net, Total 57,500    
Other Noncurrent Assets [Member]      
Operating Lease, Right-of-Use Asset 13,900    
Other Current Liabilities [Member]      
Operating Lease, Liability, Total $ 19,500    
Minimum [Member]      
Lessee, Operating Lease, Term of Contract 1 year