v3.23.1

Note 12 - Madryn Long-term Debt and Convertible Notes (Details Textual) - USD ($)		12 Months Ended
	Dec. 09, 2020	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2020	Oct. 11, 2016
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001	$ 0.0001	$ 0.0001
Madryn Credit Agreement [Member]
Repayments of Debt	$ 42,500,000
Madryn Credit Agreement [Member] | Madryn Noteholders [Member]
Debt Instrument, Face Amount					$ 70,000,000
Madryn Credit Agreement [Member] | Madryn Noteholders [Member] | Term A-1, A-2 and B Tranches of Debt [Member]
Long-term Debt, Gross				$ 60,000,000
Secured Subordinated Convertible Notes [Member] | Madryn Noteholders [Member]
Debt Instrument, Default, Increase in Interest Rate	4.00%
Debt Instrument, Termination, Minimum Principal Outstanding	$ 10,000
Debt Instrument, Convertible, Conversion Price (in dollars per share)	$ 3.25
Interest Expense, Total		$ 2,165,000	$ 2,158,000
Repayments of Long-term Debt, Total		$ 0	$ 0
Debt Instrument, Maturity Date	Dec. 09, 2025
Secured Subordinated Convertible Notes [Member] | Madryn Noteholders [Member] | Original Issuance Of Notes To Third Anniversary Date [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.00%
Secured Subordinated Convertible Notes [Member] | Madryn Noteholders [Member] | After the Third Anniversary [Member]
Debt Instrument, Interest Rate, Stated Percentage	6.00%

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- Definition

Face amount or stated value per share of common stock.

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