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Unaudited Condensed Consolidated Statements of Operations and Other Comprehensive Loss - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Dec. 31, 2021
Revenues        
Total Revenues $ 131 $ 0 $ 208 $ 0
Revenue From Contract With Customer Product And Service [Extensible List] us-gaap:RoyaltyMember us-gaap:RoyaltyMember us-gaap:RoyaltyMember us-gaap:RoyaltyMember
Research and development expenses $ 1,185 $ 926 $ 3,436 $ 2,185
Selling, general and administrative expenses 2,305 2,574 6,724 7,381
Total costs and expenses 3,490 3,500 10,160 9,566
Loss from Operations (3,359) (3,500) (9,952) (9,566)
Other Income (Expense)        
Loss on investment in equity securities (48) 0 (123) 0
Interest income 143 2 277 6
Other income 0 0 0 25
Total Other Income 95 2 154 31
Income Tax Expense 0 (2) (2) (2)
Net Loss (3,264) (3,500) (9,800) (9,537)
Other comprehensive loss:        
Unrealized gain on available-for-sale debt securities 3 0 3 0
Comprehensive loss $ (3,261) $ (3,500) $ (9,797) $ (9,537)
Net loss per common share basic $ (0.37) $ (0.40) $ (1.13) $ (1.10)
Net loss per common share diluted $ (0.37) $ (0.40) $ (1.13) $ (1.10)
Weighted average shares used in computing net loss per common share basic 8,713,617 8,705,503 8,712,294 8,702,959
Weighted average shares used in computing net loss per common share diluted 8,713,617 8,705,503 8,712,294 8,702,959