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Note 8 - Adoption of ASC Topic 606, "Revenue From Contracts With Customers" 1 (Details Textual) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 4 Months Ended 6 Months Ended 12 Months Ended
Jun. 01, 2013
Feb. 07, 2012
Apr. 30, 2013
Jan. 31, 2013
Oct. 31, 2012
Sep. 30, 2012
Jan. 31, 2012
Oct. 31, 2012
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2012
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2014
Jan. 01, 2018
Dec. 31, 2017
Mar. 31, 2017
Contract with Customer, Liability, Revenue Recognized                 $ 121,000 $ 317,000   $ 134,000 $ 397,000        
Contract with Customer, Liability, Product Distribution, Current                 1,487,000     1,487,000       $ 1,458,000  
Restricted Stock Purchase [Member]                                  
Excess Fair Value Over Proceeds Received From Purchase               $ 1,000,000                  
Tranche One [Member]                                  
Purchase Agreement Units           800,000                      
Tranche Two [Member]                                  
Purchase Agreement Units         1,200,000                        
Purchase Agreement Unit Price Per Share         $ 1.25                        
Purchase Unit Agreement Total Units Fair Value         $ 3,500,000                        
Reallocated from Deferred Revenue [Member]                                  
Stockholders' Equity, Period Increase (Decrease), Total               $ 600,000                  
Restricted Stock Units (RSUs) [Member]                                  
Proceeds from Issuance or Sale of Equity, Total                     $ 2,500,000            
Technology Service [Member]                                  
Deferred Revenue                               2,000,000  
Contract with Customer, Liability, Revenue Recognized                 28,000   13,000 35,000        
Technology Service [Member] | Deferred Revenue Decreased and Recorded as Part of The Cumulative Adjustment to Accumulated Deficit Related to ASU 2014-09 [Member]                                  
Contract with Customer, Liability, Total                             $ 1,960,000    
Avenova Product [Member] | Deferred Revenue Decreased and Recorded as Part of The Cumulative Adjustment to Accumulated Deficit Related to ASU 2014-09 [Member]                                  
Contract with Customer, Liability, Total                             1,300,000    
Avenova Product [Member] | Service Fees/Chargebacks, Prompt Payment Discounts, Rebates and Returns Reclassified to Contract Liability That is Related to ASU 2014-09 [Member]                                  
Contract with Customer, Liability, Total                             600,000    
Avenova Product [Member] | Cumulative Adjustment To The Accumulated Deficit, Including The Net Effect of Deferred Cost of Goods Sold, Related to ASU 2014-09 [Member]                                  
Contract with Customer, Liability, Total                             $ 700,000    
China Pioneer [Member] | Neutrophase [Member]                                  
Proceeds from Collaborators       $ 312,500     $ 312,500             $ 625,000      
Maximum Possible Sales Discounts                       500,000          
Integrated Healing Technologies, LLC [Member] | Neutrophase [Member]                                  
Proceeds from Collaborators   $ 750,000                              
Virbac [Member] | Auriclosene (NVC-422) [Member]                                  
Proceeds from Collaborators     $ 250,000                            
Principal Business Enterprise, Inc. [Member] | Neutrophase [Member]                                  
Proceeds from Collaborators $ 200,000                                
China Pioneer and Principal Business Enterprise Inc. [Member] | Samples and Future Products [Member]                                  
Revenue, Remaining Performance Obligation, Amount                                 $ 62,000
McKesson Corporation [Member] | Avenova Product [Member]                                  
Deferred Revenue                               $ 1,300,000  
Contract with Customer, Liability, Revenue Recognized                 2,300,000 $ 3,000,000   4,900,000 $ 5,800,000        
Contract with Customer, Liability, Product Distribution, Current                 $ 1,600,000     $ 1,600,000