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Summary of Significant Accounting Policies - Summary of financial assets and liabilities measured at fair value on recurring basis (Details) - USD ($)
Dec. 31, 2024
Mar. 31, 2024
Fair Value    
Assets:    
Cash $ 11,851,000 $ 994,000
Cash equivalents 15,281,000 17,988,000
Term loan advance to Amplex 0 300,000
Carrying Value    
Assets:    
Cash 11,851,000 994,000
Cash equivalents 15,281,000 17,988,000
Term loan advance to Amplex 0 300,000
Liabilities:    
Contingent liability (Note 13) 2,600  
Level 1    
Assets:    
Cash 11,851,000 994,000
Cash equivalents 15,281,000 17,988,000
Term loan advance to Amplex 0 0
Level 2    
Assets:    
Cash 0 0
Cash equivalents 0 0
Term loan advance to Amplex 0 0
Level 3    
Assets:    
Cash 0 0
Cash equivalents 0 0
Term loan advance to Amplex 0 300,000
Liabilities:    
Dissenting shareholders' liability (Note 2) $ 0 $ 0