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Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Cash Flows from Operating Activities    
Net loss $ (2,843) $ (3,344)
Adjustments to reconcile net loss to net cash used in operating activities:    
Interest accretion on escrow receivable (4) 0
Accretion on investments 0 (22)
Depreciation and amortization 61 70
Stock-based compensation 78 156
Non-cash lease expense 112 105
Increase (decrease) in cash resulting from changes in:    
Accounts receivable (2) (15)
Inventory 0 (111)
Prepaid expenses and other assets 248 118
Accounts payable (971) 492
Accrued expenses (499) (323)
Operating lease liabiliy (120) (109)
Net cash used in operating activities (3,940) (2,983)
Cash Flows from Investing Activities    
Purchases of investments 0 (1,480)
Maturities of investments 0 1,500
Net cash provided by investing activities 0 20
Cash Flows from Financing Activities    
Proceeds from issuance of common stock, net 1,811 6,249
Repayment of insurance premium financing liability (128)  
Net cash provided by financing activities 1,683 6,249
Net (decrease) increase in cash, cash equivalents, and restricted cash (2,257) 3,286
Cash, cash equivalents, and restricted cash at beginning of period 11,455 3,044
Cash, cash equivalents, and restricted cash at end of period 9,198 6,330
Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets    
Cash and cash equivalents 9,055 6,187
Restricted cash 143 143
Cash, cash equivalents, and restricted cash at end of period 9,198 6,330
Supplemental Disclosure of Cash Flow Information:    
Income taxes paid 0 2
Interest paid $ 4 $ 0