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Note 8 - Accrued Expenses (Details Textual) - Severance and Moving Costs [Member] - Efforts to Streamline Tracer Diagnostics Operations [Member] - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Restructuring Charges   $ 1.9
Payments for Restructuring $ 0.2 $ 1.1
Restructuring Reserve $ 0.2