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Note 4 - Stockholders' Equity, Stock Options and Warrants (Details Textual)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 196 Months Ended
Jun. 28, 2018
USD ($)
$ / shares
shares
Mar. 12, 2018
$ / shares
shares
Feb. 21, 2018
USD ($)
$ / shares
shares
Jan. 15, 2018
$ / shares
shares
Jan. 11, 2018
USD ($)
shares
Jan. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
shares
Jun. 30, 2018
USD ($)
$ / shares
shares
Jun. 30, 2017
USD ($)
Dec. 31, 2017
$ / shares
shares
Jun. 30, 2018
USD ($)
$ / shares
shares
Mar. 31, 2018
USD ($)
shares
Jan. 02, 2018
shares
Dec. 28, 2017
$ / shares
shares
Jan. 29, 2017
shares
Oct. 27, 2016
shares
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares                            
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.01       $ 0.01 $ 0.01   $ 0.01 $ 0.01     $ 0.01    
Common Stock, Shares Authorized             50,000,000 50,000,000   50,000,000 50,000,000     50,000,000 24,000,000 8,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate               0.00%                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number               2,154,442     2,154,442          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price | $ / shares               $ 2.05     $ 2.05          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term               9 years 146 days                
Class of Warrant or Right Number of Warrants Vested and Exercisable               2,556,382     2,556,382          
Allocated Share-based Compensation Expense, Total | $               $ 460,368 $ 18,276              
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options | $               $ 997,772     $ 997,772          
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost | $             $ 1,900,000                  
Employee Stock Option [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross               482,402   2,612,070            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares               $ 1.11   $ 1.45            
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition               1 year 120 days                
Vice President of Sales [Member]                                
Common Stock, Par or Stated Value Per Share | $ / shares       $ 0.01                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross       50,000                        
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares       $ 0.97                        
Number of Equal Installments Options are Expected to Vest       4                        
Vice President of Sales and Marketing [Member]                                
Common Stock, Par or Stated Value Per Share | $ / shares   $ 0.01                            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   111,112                            
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares   $ 1.35                            
Number of Equal Installments Options are Expected to Vest   4                            
Maximum [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares               $ 609.38     $ 609.38          
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares               $ 596.25                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate               3.00%                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate               66.00%                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term               10 years                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares               $ 1.0044                
Minimum [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares               0     $ 0          
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ / shares               $ 0.91                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate               2.33%                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate               59.00%                
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term               5 years                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares               $ 0.4816                
Equity Incentive Plan [Member] | Maximum [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period               3 years                
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               10 years                
Equity Incentive Plan [Member] | Minimum [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period               3 years                
Stock Incentive Plan 2012 [Member]                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                   2,500,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized                         5,000,000      
Helomics Holding Corp. [Member]                                
Notes Payable, Total | $ $ 7,600,000                              
Helomics Holding Corp. [Member]                                
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 7,500,000                              
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Held in Escrow 860,000                              
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Held in Escrow, Period 1 year 180 days                              
Percentage of Holders of Acquiree's Promissory Note Agreeing to Merger 75.00%                              
Business Acquisition, Warrant Exchange Ratio 0.6                              
Helomics Holding Corp. [Member]                                
Stock Issued During Period, Shares, New Issues         1,100,000                      
Share Exchange Agreement, Shares Received         2,500,000                      
Share Exchange Agreement, Convertible Notes Receivable | $                       $ 500,000        
Share Exchange Agreement, Convertible Notes, Percent of Stock                       5.00%        
Share Exchange Agreement, Potential Interest                       25.00%        
Share Exchange Agreement, Number of Shares Held in Escrow                       1,100,000        
Share Exchange Agreement, Contingent Revenue, Minimum | $         $ 8,000,000                      
Convertible Preferred Stock Held, Conversion Feature, Percent         20.00%                      
Helomics Warrants Held by Investors [Member] | Helomics Holding Corp. [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 1                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 18,700,000                              
Helomics Warrants Held by Investors [Member] | Helomics Holding Corp. [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 1                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 5,000,000                              
Precision Warrants [Member] | Helomics Holding Corp. [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 1                              
Business Acquisition, Warrant Issued or Issuable, Exercise Price | $ / shares $ 1                              
Business Acquisition, Equity Interest Issued or Issuable from Exchange of Warrants 23,700,000                              
Class of Warrant or Right, Additional Number of Securities Called by Warrants or Rights 14,200,000                              
Helomics Warrants Held by Other Parties [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 0.01                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 597,000                              
Helomics Warrants Held by Other Parties [Member] | Helomics Holding Corp. [Member]                                
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares $ 0.01                              
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 995,000                              
The 2018 Public Offering [Member]                                
Stock Issued During Period, Shares, New Issues           2,900,000                    
Share Price | $ / shares           $ 0.95                    
Proceeds from Issuance or Sale of Equity, Total | $           $ 2,755,000         $ 2,755,000          
The 2018 Public Offering [Member] | Series E Warrants [Member]                                
Class of Warrant or Right, Issued per Unit           0.3                    
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right           1                    
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares           $ 1                    
Over-Allotment Option [Member]                                
Stock Issued During Period, Shares, New Issues     215,247                          
Proceeds from Issuance or Sale of Equity, Total | $                     $ 358,312          
Sale of Stock, Underwriter Option Term           45 days                    
Sale of Stock, Underwriter Option, Maximum Additional Shares of Common Stock Available for Purchase           290,000                    
Sale of Stock, Underwriter Option, Number of Securities Called by Maximum Additional Warrants Available for Purchase           87,000                    
Sale of Stock, Underwriter Option, Exercise Price of Additional Warrants Available for Purchase | $ / shares           $ 0.001                    
Shares Issued, Price Per Share | $ / shares     $ 0.9497                          
Proceeds from Underwriter Shares Exercised, Net | $     $ 188,066                          
Stock Issued During Period, Underwriter Discount | $     $ 16,354                          
Underwriter Discount Percentage     8.00%