v3.19.3
Note 14 - Subsequent Events (Details Textual)
1 Months Ended 9 Months Ended 12 Months Ended
May 03, 2019
USD ($)
shares
Oct. 11, 2018
Aug. 31, 2019
USD ($)
May 31, 2019
USD ($)
shares
Apr. 30, 2019
USD ($)
Jan. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Nov. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2018
USD ($)
Jan. 31, 2017
USD ($)
Nov. 24, 2015
Proceeds from issuance of convertible promissory notes - related party             $ 4,846,000 $ 3,000,000 $ 4,500,000 $ 0            
Restricted Cash, Total             $ 253,000 $ 55,000                
Proceeds from Notes Payable, Total       $ 3,200,000                        
Stockholders' Equity Note, Stock Split, Conversion Ratio   0.0359                            
Debt Conversion, Converted Instrument, Shares Issued | shares       367,041                        
Majority Investors [Member]                                
Debt Instrument, Interest Rate, Stated Percentage             8.00%   8.00%              
Majority Investors [Member] | Second Note to Fund the Company's Operations [Member]                                
Proceeds from Notes Payable, Total     $ 500,000 $ 5,000,000                        
Oxford Finance, LLC [Member] | Term Loans [Member]                                
Debt Instrument, Periodic Payment Terms, Increase (Decrease) in Balloon Payment to be Paid                           $ 200,000 $ 100,000  
Debt Instrument, Interest Rate, Stated Percentage                               7.06%
Oxford Finance, LLC [Member] | Term Loans [Member] | Domain [Member]                                
Proceeds from Noncontrolling Interests           $ 20,000,000                    
Restricted Cash, Total           200,000                    
Debt Instrument, Periodic Payment Terms, Increase (Decrease) in Balloon Payment to be Paid           $ 50,000           $ 20,000        
Subsequent Event [Member]                                
Merger Agreement, Percentage Ownership in Combined Company, Acquirer 86.00%                              
Merger Agreement, Percentage Ownership in Combined Company, Acquiree 14.00%                              
Subsequent Event [Member] | Conversion of Notes into Series B Convertible Preferred Stock [Member]                                
Debt Conversion, Original Debt, Amount, Principal $ 3,000,000                              
Debt Conversion, Original Debt, Amount, Cumulative Accrued Interest $ 203,000                              
Subsequent Event [Member] | Conversion of Notes into Series B Convertible Preferred Stock [Member] | Series B Convertible Preferred Stock [Member]                                
Debt Conversion, Converted Instrument, Shares Issued | shares 10,223,996                              
Subsequent Event [Member] | Majority Investors [Member] | First Note to Fund the Company's Operations [Member]                                
Proceeds from Notes Payable, Total         $ 2,000,000                      
Debt Instrument, Maturity Date         Apr. 26, 2020                      
Subsequent Event [Member] | Majority Investors [Member] | Second Note to Fund the Company's Operations [Member]                                
Proceeds from Notes Payable, Total       $ 500,000                        
Debt Instrument, Maturity Date       May 29, 2020                        
Subsequent Event [Member] | Majority Investors [Member] | Notes to Fund the Company's Operations [Member]                                
Debt Instrument, Interest Rate, Stated Percentage       8.00%                        
Subsequent Event [Member] | Oxford Finance, LLC [Member] | Term Loans [Member]                                
Debt Instrument, Periodic Payment Terms, Increase (Decrease) in Balloon Payment to be Paid                     $ 30,000          
Subsequent Event [Member] | Oxford Finance, LLC [Member] | Term Loans [Member] | Domain [Member]                                
Debt Instrument, Increase of Interest-Only Periodic Payments Upon Delivery of Executed Term Sheet           60 days                    
Debt Instrument, Increase of Periodic Payments Upon Delivery of Executed Term Sheet           240 days                    
Proceeds from Noncontrolling Interests           $ 20,000,000                    
Restricted Cash, Total                         $ 200,000      
Debt Instrument, Periodic Payment Terms, Increase (Decrease) in Balloon Payment to be Paid           $ 50,000