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The price per share of the conversion feature embedded in the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Note 10 - Madryn Long-term Debt and Convertible Notes (Details Textual) - USD ($)		3 Months Ended			4 Months Ended	12 Months Ended
	Dec. 09, 2020	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2021	Apr. 29, 2020	Oct. 14, 2018	Aug. 14, 2018	Aug. 04, 2018	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
Debt Instrument, Interest Rate, Stated Percentage				10.50%	10.50%	10.50%			12.00%	9.00%		9.00%
Debt Instrument, Covenant, Minimum Revenue Threshold						$ 75,000,000	$ 85,000,000
Debt Instrument, Covenant, Minimum Cash Proceeds from Issuance of Equity					$ 5,000,000
Debt Instrument, Covenant, Best Effort, Additional Proceeds from Issuance of Equity,					2,000,000
Debt Instrument, Interest Rate, Percentage Paid in Cash				50.00%
Debt Instrument, Interest Rate, Percentage Paid in Kind				50.00%
Madryn Credit Agreement [Member] \| Madryn Noteholders [Member] \| Interest Only Period [Member]
Debt Instrument, Interest Rate, Stated Percentage											9.00%
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	$ 60,000,000	$ 60,000,000
Secured Subordinated Convertible Notes [Member] \| Madryn Noteholders [Member]
Debt Instrument, Face Amount	$ 26,695,000
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		$ 534,000	$ 527,000
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%