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Consolidated Statements of Operations and Other Comprehensive Loss - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Revenues    
Total Revenues $ 370 $ 1,500
Revenue From Contract With Customer Product And Service [Extensible List] us-gaap:RoyaltyMember us-gaap:RoyaltyMember
Research and development expenses $ 8,885 $ 3,320
Selling, general, and administrative expenses 9,216 9,659
Total costs and expenses 18,101 12,979
Loss from Operations (17,731) (11,479)
Other Income (Expense)    
Loss on fixed asset disposals (9) 0
Gain on investment in equity securities 29 0
Interest income 454 8
Other income 0 25
Total Other Income 474 33
Income Tax Expense (2) (2)
Net Loss (17,259) (11,448)
Other comprehensive income:    
Unrealized gain on available-for-sale debt securities 2 0
Comprehensive Loss $ (17,257) $ (11,448)
Net loss per common share basic $ (1.98) $ (1.32)
Net loss per common share diluted $ (1.98) $ (1.32)
Weighted average shares used in computing net loss per common share basic 8,713,032 8,703,596
Weighted average shares used in computing net loss per common share diluted 8,713,032 8,703,596