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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
May 13, 2024
May 08, 2024
Sep. 30, 2024
Sep. 30, 2024
Sep. 30, 2024
Sep. 30, 2023
Mar. 31, 2024
Summary Of Significant Accounting Policies [Line Items]              
Cash and cash equivalents     $ 3,174,000 $ 3,174,000 $ 3,174,000 $ 7,617,000 $ 2,901,000
Restricted cash     143,000 143,000 143,000 143,000 143,000
Accumulated deficit     $ (345,562,000) $ (345,562,000) (345,562,000)   $ (339,669,000)
Cash flow from operations         $ 5,625,000 8,460,000  
Issuance of common stock     15,365,825 15,365,825 15,365,825   10,077,726
Inventory reserve     $ 200,000 $ 200,000 $ 200,000    
Dilutive effect         $ 0 $ 0  
Common stock equivalents excluded from computing diluted net loss per share         11,300,000 1,000,000  
Minimum percentage of income tax payment net of refunds received         5.00%    
Insurance Premium Financing Liability [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Insurance premium financing agreement description         In September 2024, the Company entered into an insurance premium financing agreement for $0.4 million, with a term of nine months and an annual interest rate of 8.57%. The Company made a down payment of 10% and is required to make monthly principal and interest payments of $44,281 over the term of the agreement, which matures in June 2025.    
Financing agreement amount     $ 400,000 400,000 $ 400,000    
Term     9 months        
Annual interest rate     8.57%        
Percentage of down payment     10.00%        
Monthly principal and interest payments     $ 44,281        
Prepaid insurance included in prepaid expenses and other current assets     400,000 400,000 400,000    
Mosaic              
Summary Of Significant Accounting Policies [Line Items]              
Inventory finished goods, net of reserve     $ 600,000 $ 600,000 $ 600,000   $ 300,000
Common Warrants [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Issuance of common stock   5,000,000          
Issuance of warrants   1,562,500          
Stock offering price per share   $ 0.8          
Pre-Funded Warrants [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Stock offering price per share   $ 0.799          
At-The-Market Facility [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Issuance of common stock     1,352,600 1,352,600 1,352,600    
Issuance of common stock       0 1,352,600    
Net proceeds from issuance of offerings         $ 1,700,000    
Public Offering [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Initial offering date   May 8, 2024          
Issuance of common stock   1,562,500          
Net proceeds from issuance of offerings $ 4,500,000            
Public Offering [Member] | Common Warrants [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Issuance of common stock   5,000,000          
Public Offering [Member] | Common Warrants [Member] | Maximum [Member]              
Summary Of Significant Accounting Policies [Line Items]              
Issuance of warrants   5,000,000