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Note 3 - Balance Sheet Details - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Prepaid Expense and Other Assets [Abstract]    
Prepaid insurance $ 473 $ 428
Other receivables 96 148
Prepaid subscriptions and fees 148 138
Prepaid software licenses 19 64
Deposits 12 0
Deferred equity issuance costs 76 112
Prepaid other 6 6
Prepaid expenses and other current assets $ 830 $ 896