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Consolidated Statements of Operations and Other Comprehensive Loss - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Revenues    
Total Revenues $ 109 $ 370
Revenue From Contract With Customer Product And Service [Extensible List] Royalty [Member] Royalty [Member]
Research and development expenses $ 5,498 $ 8,885
Selling, general, and administrative expenses 9,697 9,216
Total costs and expenses 15,195 18,101
Loss from Operations (15,086) (17,731)
Other Income (Expense)    
Loss on fixed asset disposals 0 (9)
Gain on investment in equity securities 12 29
Interest income 405 454
Total Other Income 417 474
Income Tax Expense (2) (2)
Net Loss (14,671) (17,259)
Other comprehensive income:    
Unrealized gain (loss) on available-for-sale debt securities (2) 2
Comprehensive Loss $ (14,673) $ (17,257)
Net loss per common share basic $ (1.6) $ (1.98)
Net loss per common share diluted $ (1.6) $ (1.98)
Weighted average shares used in computing net loss per common share basic 9,144,922 8,713,032
Weighted average shares used in computing net loss per common share diluted 9,144,922 8,713,032