Quarterly report pursuant to Section 13 or 15(d)

Sale of Common Stock and Prefunded Warrants - Additional Information (Details)

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Sale of Common Stock and Prefunded Warrants - Additional Information (Details) - USD ($)
3 Months Ended
Jun. 06, 2021
Apr. 27, 2021
Jun. 25, 2022
Sep. 25, 2021
Jun. 26, 2021
Class of Warrant or Right [Line Items]          
Proceeds from issuance of warrants     $ 0   $ 1,500,000
Dividends, common stock         203,000
Warrant issuance cost     0   157,000
Fair value adjustment of warrants     0   (46,000)
Stock issued during period, shares, new issues (in shares) 46,154        
Shares issued, price per share (in dollars per share) $ 3.25        
Proceeds from issuance of common stock $ 150,000   $ 0   145,000
Proceeds from issuance of common stock, net $ 145,000        
Prefunded Warrants [Member] | Measurement Input, Exercise Price [Member] | Minimum [Member]          
Class of Warrant or Right [Line Items]          
Class of warrant or right, exercise price of warrants or rights (in dollars per share)   $ 0.01      
Private Placement [Member] | Prefunded Warrants [Member]          
Class of Warrant or Right [Line Items]          
Class of warrant or right, number of warrants issued (in shares)   461,538      
Proceeds from issuance of warrants   $ 1,500,000      
Class of warrant or right, price per warrant (in dollars per share)   $ 3.25      
Proceeds from issuance of warrants, net   $ 1,343,000      
Class of warrant or right, maximum common stock ownership percentage after the exercise   9.99%      
Prefunded warrants liability   $ 1,703,000      
Dividends, common stock   203,000      
Warrant issuance cost   $ 157,000      
Fair value adjustment of warrants       $ 46,000 $ (46,000)
Private Placement [Member] | Placement Agent Warrants [Member]          
Class of Warrant or Right [Line Items]          
Class of warrant or right, exercise price of warrants or rights (in dollars per share)   $ 3.575      
Class of warrant or right, number of securities called by warrants or rights (in shares)   23,076