Annual report pursuant to Section 13 and 15(d)

Preferred Stock and Equity Offerings (Details Narrative)

v3.19.1
Preferred Stock and Equity Offerings (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Oct. 12, 2017
Jul. 07, 2017
Jul. 05, 2017
Jun. 21, 2017
Jun. 16, 2017
Apr. 18, 2017
Mar. 22, 2017
Feb. 08, 2017
Jan. 25, 2017
Jan. 06, 2017
Sep. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Jul. 31, 2017
Preferred stock, shares authorized                       5,000,000 5,000,000  
Net proceeds from equity offerings                         $ 29,900  
Number of common stock issued, shares       9,900,000                    
Proceeds from issuance of common stock                       23,081  
Warrants to purchase shares of common stock                           875,000
Fair value of warrants issued                     $ 200 112 141  
Option to purchase overallotment option, percentage         4.00%                  
Warrant term     3 years                      
Debt conversion, converted instrument, amount                       $ 11,643  
Loss on conversion of convertible debt                       4,300    
Underwriters' overallotment option to purchase common stock         1,875,000                  
Warrant exercised                         1,700,000  
Warrant exercise price $ 1.80   $ 1.25 $ 1.25     $ 4.69   $ 4.69          
Underwriters purchase common stock, value                           $ 960
Warrant expiring date     Aug. 31, 2020                      
Warrants exercisable into common stock     150,000                      
Other (expense) income, net                       $ 263 $ (2,128)  
Gross proceeds from warrant exercise                         $ 2,100  
Number of common stock in connection with contracts for consulting services                       800,000    
Underwriter Discount [Member]                            
Underwriters purchase common stock, value                           $ 72
RedPath Note [Member] | Senior Secured Non-Convertible Note [Member]                            
Debt conversion, converted instrument, amount           $ 3,550                
Debt conversion, converted instrument, shares issued           3,795,429                
Termination Agreement [Member] | RedPath Equityholder Representative [Member]                            
Warrants to purchase shares of common stock             100,000              
Common stock purchase price per share             $ 4.69              
Fair value of warrants issued             $ 190              
Warrant term             5 years              
First Registered Direct Offering [Member]                            
Number of common stock issued, shares                   630,000        
Common stock price, per share                   $ 6.81        
Proceeds from issuance of common stock                   $ 4,300        
Second Registered Direct Offering [Member]                            
Number of common stock issued, shares                 855,000          
Fair value of warrants issued                 $ 1,670          
Second Registered Direct Offering [Member] | Private Placement [Member]                            
Warrants to purchase shares of common stock                 855,000          
Common stock purchase price per share                 $ 4.69          
Proceeds from issuance or sale of equity                 $ 4,000          
Confidentially Marketed Public Offering (CMPO) [Member]                            
Number of common stock issued, shares               1,200,000            
Common stock price, per share               $ 3.00            
Proceeds from issuance or sale of equity               $ 3,900            
Option to purchase overallotment option, percentage               9.00%            
Common Stock [Member]                            
Number of common stock issued, shares                       867,000 34  
Warrants to purchase shares of common stock         9,900,000                  
Base Warrants [Member]                            
Number of common stock issued, shares       12,500,000                    
Warrants to purchase shares of common stock         12,500,000                  
Common stock purchase price per share         $ 1.25                  
Fair value of warrants issued       $ 5,300                    
Common stock effective purchase price         $ 1.10                  
Underwriters' overallotment option to purchase common stock         1,875,000                  
Underwriter Warrants[Member]                            
Number of common stock issued, shares       575,000                    
Warrants to purchase shares of common stock         2,600,000                  
Common stock purchase price per share         $ 0.01                  
Warrant exercise price                       $ 1.32    
Base Warrant And Prefunded Warrants [Member]                            
Common stock effective purchase price         $ 1.09                  
Pre-Funded Warrants [Member]                            
Number of common stock issued, shares       2,600,000                    
Warrants to purchase shares of common stock   2,600,000                        
Fair value of warrants issued   $ 2,300                        
Underwriting discount rate         7.50%                  
Offering and over-allotment and reasonable out-of-pocket expenses         $ 100                  
Warrant exercised   2,600,000                        
Warrant exercise price   $ 0.01                   $ 0.01    
Proceeds from warrants   $ 26,000                        
Overallotment Warrants [Member]                            
Number of common stock issued, shares       1,875,000                    
Fair value of warrants issued       $ 800                    
4 Million Base Warrants [Member]                            
Common stock purchase price per share $ 1.25                          
Proceeds from warrants $ 5,000                          
Other (expense) income, net $ 2,000                          
4 Million Base Warrants [Member] | Private Placement [Member]                            
Warrants to purchase shares of common stock 3,200,000                          
Warrant exercise price $ 1.80