Quarterly report pursuant to Section 13 or 15(d)

Convertible Preferred Stock and Stockholders' Equity - Warrants for shares of common stock (Details)

v3.20.2
Convertible Preferred Stock and Stockholders' Equity - Warrants for shares of common stock (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Jul. 27, 2020
USD ($)
shares
Apr. 23, 2020
$ / shares
shares
Apr. 30, 2020
USD ($)
$ / shares
shares
Mar. 31, 2020
USD ($)
$ / shares
shares
Sep. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2020
USD ($)
Sep. 30, 2020
USD ($)
$ / shares
shares
Sep. 30, 2019
USD ($)
Oct. 20, 2020
shares
Feb. 06, 2020
shares
Apr. 18, 2019
shares
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares                   4,553 12,756
Deemed dividend from warrant repricing         $ 0 $ (134,000) $ 134,000 $ 0      
Number of shares available for grant | shares         352   352        
2020 Stock Incentive Plan                      
Class of Stock [Line Items]                      
Common stock authorized for issuance | shares 650,000                    
2020 Stock Incentive Plan | Restricted stock units                      
Class of Stock [Line Items]                      
Number of shares available for grant | shares 614,824                    
Number of common stock per restricted stock unit 1                    
LTSI                      
Class of Stock [Line Items]                      
Number of shares available for grant | shares         99,619   99,619        
LTSI | Mr. Oliva                      
Class of Stock [Line Items]                      
Accelerated vesting | shares 7,500                    
LTSI | Restricted stock units                      
Class of Stock [Line Items]                      
Accelerated vesting | shares 39,429                    
Stock based compensation charge in connection with acceleration of vesting $ 649,000                    
Bonus expense $ 57,000                    
Subsequent Events | 2020 Stock Incentive Plan                      
Class of Stock [Line Items]                      
Common stock authorized for issuance | shares                 650,000    
June 4th Purchase Agreement                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares         2,275,000   2,275,000        
Exercise price of warrants | $ / shares         $ 2.55   $ 2.55        
Fair value of warrant         $ 3,153,000   $ 3,153,000        
Common Stock Price | $ / shares         $ 2.52   $ 2.52        
June 8th Purchase Agreement                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares         2,040,000   2,040,000        
Exercise price of warrants | $ / shares         $ 2.61   $ 2.61        
Fair value of warrant         $ 2,375,000   $ 2,375,000        
Common Stock Price | $ / shares         $ 2.25   $ 2.25        
April 2020 public offering                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares     1,525,000                
Exercise price of warrants | $ / shares   $ 3.25 $ 0.01                
Fair value of warrant     $ 475,000                
Common Stock Price | $ / shares     $ 2.50                
Combined shares price | $ / shares   $ 3.24 $ 3.25                
Deemed dividend from warrant repricing     $ 2,606,000       $ 134,000        
Shares issued on exercise of warrants | shares     475,000                
Proceeds from Issuance of Warrants     $ 4,750                
Option To Purchase Additional Shares Or Warrants | shares   300,000                  
March 2020 Warrant                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares       227,679              
Exercise price of warrants | $ / shares       $ 6.40              
Fair value of warrant       $ 625,000              
Common Stock Price | $ / shares       $ 5.40              
Fair Value Expected Term       5 years              
March 2020 Maxim Warrant                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares       20,400              
Prefunded common stock purchase warrants | April 2020 public offering                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares     291,000                
Common stock purchase warrants | April 2020 public offering                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares   475,000                  
Exercise price of warrants | $ / shares     $ 3.25                
Option To Purchase Additional Shares Or Warrants | shares   229,100                  
April 2020 Maxim Warrant                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares     100,000   3,750   3,750        
Exercise price of warrants | $ / shares     $ 3.90                
Fair value of warrant     $ 106,000                
Common Stock Price | $ / shares     $ 2.50   $ 15.80   $ 15.80        
Combined shares price | $ / shares             $ 0.20        
Shares issued on exercise of warrants | shares             100,000        
Option To Purchase Additional Shares Or Warrants | shares             20,722        
April 2020 Maxim Warrant | April 2020 public offering                      
Class of Stock [Line Items]                      
Warrants to purchase shares of Common Stock | shares   100,000 475,000                
Exercise price of warrants | $ / shares     $ 3.90                
Dividend Yield | June 4th Purchase Agreement                      
Class of Stock [Line Items]                      
Measurement input         0.0   0.0        
Dividend Yield | June 8th Purchase Agreement                      
Class of Stock [Line Items]                      
Measurement input         0.0   0.0        
Dividend Yield | April 2020 public offering                      
Class of Stock [Line Items]                      
Measurement input     0.00                
Dividend Yield | March 2020 Warrant                      
Class of Stock [Line Items]                      
Measurement input       0.0              
Dividend Yield | April 2020 Maxim Warrant                      
Class of Stock [Line Items]                      
Measurement input     0                
Volatility | June 4th Purchase Agreement                      
Class of Stock [Line Items]                      
Measurement input         64.0   64.0        
Volatility | June 8th Purchase Agreement                      
Class of Stock [Line Items]                      
Measurement input         64.0   64.0        
Volatility | April 2020 public offering                      
Class of Stock [Line Items]                      
Measurement input     64.00                
Volatility | March 2020 Warrant                      
Class of Stock [Line Items]                      
Measurement input       61.0              
Volatility | April 2020 Maxim Warrant                      
Class of Stock [Line Items]                      
Measurement input     64                
Risk-free rate of interest | June 4th Purchase Agreement                      
Class of Stock [Line Items]                      
Measurement input         0.45   0.45        
Risk-free rate of interest | June 8th Purchase Agreement                      
Class of Stock [Line Items]                      
Measurement input         0.32   0.32        
Risk-free rate of interest | April 2020 public offering                      
Class of Stock [Line Items]                      
Measurement input     0.37                
Risk-free rate of interest | March 2020 Warrant                      
Class of Stock [Line Items]                      
Measurement input       0.38              
Risk-free rate of interest | April 2020 Maxim Warrant                      
Class of Stock [Line Items]                      
Measurement input     0.37                
Term (Years) | June 4th Purchase Agreement                      
Class of Stock [Line Items]                      
Fair Value Expected Term             5 years 6 months        
Term (Years) | June 8th Purchase Agreement                      
Class of Stock [Line Items]                      
Fair Value Expected Term             5 years 6 months        
Term (Years) | April 2020 public offering                      
Class of Stock [Line Items]                      
Fair Value Expected Term     5 years                
Term (Years) | April 2020 Maxim Warrant                      
Class of Stock [Line Items]                      
Fair Value Expected Term     5 years