Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Narrative) (Details)

v3.24.0.1
Basis of Presentation (Narrative) (Details)
 6 Months Ended
Dec. 07, 2023
USD ($)
shares
Dec. 05, 2023
shares
Nov. 27, 2023
Oct. 01, 2023
USD ($)
shares
Nov. 03, 2022
position
Oct. 07, 2022
Sep. 22, 2022
Dec. 31, 2023
USD ($)
$ / shares
shares
Feb. 09, 2024
USD ($)
Sep. 30, 2023
$ / shares
Jun. 30, 2023
USD ($)
$ / shares
Dec. 31, 2022
USD ($)
Nov. 30, 2022
ft²
Jun. 30, 2022
USD ($)
Nov. 01, 2021
USD ($)
Basis of Presentation [Line Items]                              
Percentage of workforce reduction         60.00%                    
Number of positions reduced | position         69                    
Operations ceased, area of land | ft²                         130,000    
Common stock, par value (in dollars per share) | $ / shares               $ 0.001     $ 0.001        
Gross proceeds $ 4,500,000                            
Cash, cash equivalents and restricted cash               $ 4,060,000     $ 7,579,000 $ 3,949,000   $ 28,672,000  
Restricted Cash               1,300,000              
Restricted cash, current               $ 1,057,000     3,025,000        
Reverse stock split, shares received per share tendered     0.05     0.04 0.04                
Subsequent Event                              
Basis of Presentation [Line Items]                              
Cash, cash equivalents and restricted cash                 $ 3,400,000            
Restricted cash, current                 $ 1,100,000            
At-The-Market Offerings                              
Basis of Presentation [Line Items]                              
Shares sold | shares               170,989              
Proceeds from offering               $ 1,700,000              
Common stock, par value (in dollars per share) | $ / shares                   $ 0.001          
Lincoln Park Purchase Agreement                              
Basis of Presentation [Line Items]                              
Shares sold | shares       21,457       181,141              
Proceeds from offering       $ 100,000       $ 1,200,000              
Offering 2023                              
Basis of Presentation [Line Items]                              
Shares sold | shares 600,000 600,000                          
Offering 2023 | Pre Funded Warrants                              
Basis of Presentation [Line Items]                              
Number of warrants issued | shares 1,650,000                            
Warrants to purchase shares of Common Stock | shares 1,650,000 1,650,000                          
Offering 2023 | Series C Warrants                              
Basis of Presentation [Line Items]                              
Number of warrants issued | shares 2,250,000                            
Warrants to purchase shares of Common Stock | shares 2,250,000 2,250,000                          
Offering 2023 | Series D Warrants                              
Basis of Presentation [Line Items]                              
Number of warrants issued | shares 2,250,000                            
Warrants to purchase shares of Common Stock | shares 2,250,000 2,250,000                          
Secured Term Loan                              
Basis of Presentation [Line Items]                              
Secured term loan                     13,057,000       $ 22,375,000
Debt balance outstanding               $ 12,655,000     $ 12,937,000