XML 45 R33.htm IDEA: XBRL DOCUMENT v3.20.2
Stockholders' Equity - Additional Information (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
May 01, 2020
Apr. 22, 2020
Apr. 12, 2019
Jul. 31, 2020
Apr. 30, 2019
Jan. 31, 2018
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Apr. 21, 2020
Feb. 28, 2018
Feb. 15, 2018
Stockholders Equity [Line Items]                                
Aggregate commission rate           3.00%                    
Stock registered for resale (in shares) 7,500,000                              
Issuance of common stock             $ 5,277,622 $ 4,022,336 $ 5,222,687   $ 5,151,702          
Exercise price (in usd per share)                             $ 3.00  
Warrant, exercise price, decrease (in usd per share)       $ 0.96 $ 0.98                      
Deemed dividend from trigger of down round provision       $ 6,863 $ 800,000   $ 6,863     $ 0   $ 6,863 $ 789,594      
Warrants exercised (in shares)             126,000     0   1,825,000 0      
Warrant exercises, gross             $ 121,000         $ 1,800,000        
Accounting Standards Update 2017-11                                
Stockholders Equity [Line Items]                                
Estimated fair value of warrants recorded in equity                               $ 3,000,000.0
Lincoln Park                                
Stockholders Equity [Line Items]                                
Obligation to purchase common stock   $ 15,000,000.0                            
ATM Sales Agreement                                
Stockholders Equity [Line Items]                                
Common stock, shares issued and sold             1,952,512         7,916,092        
Aggregate net proceeds on sales of shares of common stock             $ 2,400,000         $ 10,800,000        
Offering expenses             82,000         $ 420,000        
Public Stock Offering                                
Stockholders Equity [Line Items]                                
Common stock, shares issued and sold         4,575,000                      
Stock sale price (in usd per share)         $ 1.10                      
Underwritten Offering                                
Stockholders Equity [Line Items]                                
Common stock, shares issued and sold         5,261,250                      
Underwriters overallotment option to purchase additional shares of common stock and warrants period         30 days                      
Underwriters option to purchase additional shares     686,250                          
Gross proceeds from offering of common stock and warrants         $ 5,800,000                      
Proceeds received in public offering, net of underwriting discounts and offering expenses         $ 5,200,000                      
Purchase Agreement                                
Stockholders Equity [Line Items]                                
Common stock, shares issued and sold   285,714                   3,882,160        
Legal, accounting and other fees related to Purchase Agreement   $ 374,000                            
Unamortized costs related to legal, accounting, and other fees             $ 269,000         $ 269,000        
Issuance of common stock                       4,200,000        
Offering expenses                       $ 105,000        
Purchase Agreement | Lincoln Park                                
Stockholders Equity [Line Items]                                
Common stock, shares issued and sold             3,000,000.0                  
Aggregate net proceeds on sales of shares of common stock             $ 3,300,000                  
Offering expenses             $ 83,000                  
Regular purchase, common stock issuable (in shares) (up to)   200,000                            
Regular purchase, common stock issuable, maximum amount (in shares)   1,000,000.0                            
Exchange cap (in shares)   4,941,089                            
Closing price of the Company's common stock (in usd per share)                           $ 1.0117    
Exchange cap, percentage   9.99%                            
Purchase Agreement | Lincoln Park | Minimum                                
Stockholders Equity [Line Items]                                
Stock sale price (in usd per share)   $ 1.50                            
Regular purchase, common stock issuable, increase amount (in shares)   250,000                            
Purchase Agreement | Lincoln Park | Maximum                                
Stockholders Equity [Line Items]                                
Stock sale price (in usd per share)   $ 3.00                            
Regular purchase, common stock issuable, increase amount (in shares)   300,000