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Note 1 - Summary of Significant Accounting Policies (Details Textual)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 196 Months Ended
Jan. 31, 2018
USD ($)
Jun. 30, 2018
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
$ / shares
shares
Jun. 30, 2018
USD ($)
$ / shares
shares
Mar. 31, 2018
Feb. 21, 2018
$ / shares
Dec. 28, 2017
$ / shares
Dec. 31, 2016
USD ($)
Common Stock, Shares, Outstanding, Ending Balance | shares   12,089,446   12,089,446   6,943,283 12,089,446        
Common Stock, Par or Stated Value Per Share | $ / shares   $ 0.01   $ 0.01   $ 0.01 $ 0.01   $ 0.01 $ 0.01  
Retained Earnings (Accumulated Deficit), Ending Balance   $ (58,898,477)   $ (58,898,477)   $ (54,765,045) $ (58,898,477)        
Cash and Cash Equivalents, at Carrying Value, Ending Balance   1,004,269 $ 1,159,849 1,004,269 $ 1,159,849 766,189 1,004,269       $ 1,764,090
Stockholders' Equity, Period Increase (Decrease), Total             35,840,380        
Stock Issued During Period, Value, New Issues       2,755,087   3,421,188          
Debt Instrument, Increase (Decrease), Net, Total             $ 5,685,000        
Depreciation, Total   18,825 14,519 33,321 30,204            
Amortization of Intangible Assets, Total   4,070 2,902 7,741 5,790            
Income Tax Expense (Benefit), Total   $ 0 0 $ 0 0            
Valuation Allowance Percentage   100.00%   100.00%     100.00%        
Unrecognized Tax Benefits, Ending Balance   $ 0   $ 0     $ 0        
Cash, Uninsured Amount   794,125   $ 794,125     794,125        
Number of Operating Segments       2              
Non-US [Member]                      
Revenues, Total   $ 3,178 $ 0 $ 5,866 $ 26,662            
Earliest Tax Year [Member]                      
Open Tax Year       2014              
IPO [Member]                      
Stock Issued During Period, Value, New Issues             13,555,003        
Proceeds from Issuance or Sale of Equity, Total             3,937,500        
The 2016 Registered Direct Offering [Member]                      
Proceeds from Issuance or Sale of Equity, Net of Stock Issuance Costs             1,739,770        
Over-Allotment Option [Member]                      
Stock Issued During Period, Value, New Issues       $ 204,422   $ 393,750          
Proceeds from Issuance or Sale of Equity, Total             358,312        
The 2018 Public Offering [Member]                      
Proceeds from Issuance or Sale of Equity, Total $ 2,755,000           2,755,000        
Series A Convertible Preferred Stock [Member] | Private Placement [Member]                      
Stock Issued During Period, Value, New Issues             2,055,000        
Series C Convertible Preferred Stock [Member] | Private Placement [Member]                      
Stock Issued During Period, Value, New Issues             $ 1,300,000        
Helomics Holding Corp. [Member]                      
Share Exchange Agreement, Potential Interest               25.00%