Quarterly report pursuant to Section 13 or 15(d)

Equity - Narrative (Details)

v3.20.2
Equity - Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended
Jul. 31, 2020
USD ($)
period
$ / shares
shares
Apr. 30, 2020
USD ($)
$ / shares
shares
Feb. 29, 2020
USD ($)
$ / shares
shares
Jul. 31, 2019
period
$ / shares
shares
Jun. 30, 2020
USD ($)
shares
Jun. 30, 2019
USD ($)
Feb. 10, 2020
shares
Class of Stock [Line Items]              
Shares granted, aggregate fair value | $         $ 0.1    
Unrecognized compensation cost, net of estimated forfeitures, related to the Company's non-vested equity awards | $         $ 2.2    
Weighted average period of expected recognition of compensation cost (in years)         2 years 1 month 17 days    
Fair value of options vesting | $         $ 0.4 $ 0.5  
Shares granted (in shares)         90,000    
Subsequent Event              
Class of Stock [Line Items]              
Shares granted (in shares) 1,349,750            
2015 Stock Plan              
Class of Stock [Line Items]              
Number of shares available for grant (in shares)         10,500,000    
Number of shares remaining to be issued (in shares)         6,227,093    
Employee Stock Option and Non-Employee Stock Option              
Class of Stock [Line Items]              
Options term period         10 years    
Employee Stock Option              
Class of Stock [Line Items]              
Options vesting period         4 years    
Non-Employee Stock Option | Minimum              
Class of Stock [Line Items]              
Options vesting period         1 year    
Non-Employee Stock Option | Maximum              
Class of Stock [Line Items]              
Options vesting period         3 years    
Restricted Stock Units (RSUs)              
Class of Stock [Line Items]              
Weighted average period of expected recognition of compensation cost (in years)         3 years    
Granted (in shares)       316,907      
Number of installment periods | period       4      
Weighted average grant date fair value for equity investments granted other than options (dollars per share) | $ / shares       $ 1.31      
Vested (in shares)         0    
Forfeited (in shares)         0    
Compensation cost not yet recognized | $         $ 0.3    
Restricted Stock Units (RSUs) | Subsequent Event              
Class of Stock [Line Items]              
Granted (in shares) 353,211            
Number of installment periods | period 4            
Vested (in shares) 79,227            
Warrants in Connection with February 2020 Stock Offering              
Class of Stock [Line Items]              
Shares purchased from issuance of warrants (in shares)     5,625,000       5,625,000
At Market Issuance Sales Agreement              
Class of Stock [Line Items]              
Number of shares sold (in shares)   7,170,964          
Sale of common stock (in dollars per share) | $ / shares   $ 1.44          
Gross proceeds from transaction | $   $ 10.3          
Transaction expenses | $   $ 0.3          
At Market Issuance Sales Agreement | Subsequent Event              
Class of Stock [Line Items]              
Number of shares sold (in shares) 1,301,126            
Sale of common stock (in dollars per share) | $ / shares $ 1.47            
Gross proceeds from transaction | $ $ 1.9            
February 2020 Stock Offering              
Class of Stock [Line Items]              
Number of shares sold (in shares)     7,500,000        
Sale of common stock (in dollars per share) | $ / shares     $ 0.80        
Gross proceeds from transaction | $     $ 6.0        
Transaction expenses | $     $ 0.7