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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Cash Flows from operating activities    
Net loss $ (17,470) $ (13,879)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 2,701 2,724
Loss on asset disposal 21
Depreciation and amortization 426 152
Shares issued for services 19 203
Changes in assets and liabilities:    
Prepaid expenses and other assets (94) (14)
Lease right-of-use assets 342 203
Accounts payable and accrued expenses 458 (200)
Change in lease liabilities (355) (200)
Net cash used in operating activities (13,952) (11,011)
Cash flows from investing activities    
Purchases of property and equipment (1,700) (1,638)
Net cash used in investing activities (1,700) (1,638)
Cash flows from financing activities    
Proceeds from at-the-market sales of common stock, net 278
Proceeds from exercise of common stock warrants 742
Proceeds from public and registered direct offerings, net 20,065 7,372
Net cash provided by financing activities 21,085 7,372
Net increase (decrease) in cash and cash equivalents 5,433 (5,277)
Cash and cash equivalents, at beginning of year 3,799 9,076
Cash and cash equivalents, at end of year 9,232 3,799
Noncash investing and financing activities:    
Right-of-use asset obtained in exchange for lease liability 1,561
Receivable from transfer agent for warrant exercise proceeds 142
Cash paid for:    
Income taxes $ 2 $ 2