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Note 3 - Balance Sheet Details - Summary of Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Prepaid Expense and Other Assets [Abstract]    
Prepaid insurance $ 384 $ 428
Other receivables 24 148
Prepaid subscriptions and fees 116 138
Prepaid software licenses 57 64
Deposits 12 0
Deferred equity issuance costs 75 112
Prepaid other 5 6
Prepaid expenses and other current assets $ 673 $ 896