Note 9 - Credit Facility, Term Loans and Warrants (Details Textual) - USD ($) $ / shares in Units, $ in Thousands						12 Months Ended
	Oct. 04, 2022	Oct. 04, 2022	Sep. 29, 2022	Mar. 01, 2022	Dec. 22, 2021	Dec. 31, 2023	Dec. 31, 2022	Feb. 23, 2024	Aug. 11, 2023	Dec. 22, 2022
Common Stock, Par or Stated Value Per Share (in dollars per share)					$ 0.0001	$ 0.0001	$ 0.0001		$ 0.0001
Proceeds from Lines of Credit						$ 79,806	$ 136,687
Warrant Liability				$ 19,000		1,100
Gain (Loss) on Issuance of Equity						(0)	(18,669)
Securities Purchase Agreement [Member] | Private Placement [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.0001
Stock Issued During Period, Shares, New Issues (in shares)				6,436,322
Stock and Warrants, Combined Issuance Price (in dollars per share)				$ 2.91
Proceeds from Issuance or Sale of Equity				$ 27,500
Securities Purchase Agreement [Member] | Registered Direct Offering [Member]
Gain (Loss) on Issuance of Equity						$ (12,800)
September Purchase Agreements [Member] | Registered Direct Offering [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			10,643,034
Stock Issued During Period, Shares, New Issues (in shares)	10,643,034	10,643,034	10,643,034
Proceeds from Issuance or Sale of Equity	$ 20,200
Gain (Loss) on Issuance of Equity							$ (12,800)
September Purchase Agreements [Member] | Registered Direct Offering [Member] | Accredited Purchasers [Member]
Stock Issued During Period, Shares, New Issues (in shares)			10,526,368
Stock and Warrants, Combined Issuance Price (in dollars per share)			$ 1.9
September Purchase Agreements [Member] | Registered Direct Offering [Member] | Insiders [Member]
Stock Issued During Period, Shares, New Issues (in shares)			116,666
Stock and Warrants, Combined Issuance Price (in dollars per share)			$ 2.1
Terminated Notes [Member]
Debt Instrument, Face Amount					$ 110,000
Midcap Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)					200,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)					$ 4.7
Warrants and Rights Outstanding, Term (Year)					10 years
Common Stock Warrants and Prefunded Warrants [Member] | Securities Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				4,827,242
Class of Warrant or Right, Sale Price (in dollars per share)				$ 2.91
Prefunded Warrants [Member] | Securities Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				3,013,850
Common Stock Warrants [Member] | Securities Purchase Agreement [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				2,260,388
Common Stock Warrants [Member] | September Purchase Agreements [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			10,643,034
Common Stock Warrants [Member] | September Purchase Agreements [Member] | Accredited Purchasers [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			10,526,368
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			1
Common Stock Warrants [Member] | September Purchase Agreements [Member] | Insiders [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			116,666
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)			1
Line of Credit [Member] | Midcap Credit Facility [Member]
Debt Instrument, Term (Year)					3 years
Line of Credit Facility, Maximum Borrowing Capacity					$ 40,000
Proceeds from Lines of Credit					$ 27,600
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage					0.50%
Line Of Credit Facility, Maximum Liquidity Requirements During Period					$ 12,500
Line Of Credit Facility, Maximum Liquidity Requirements At All Other Times					$ 15,000					$ 15,000
Line of Credit [Member] | Midcap Credit Facility [Member] | Subsequent Event [Member]
Line of Credit Facility, Maximum Borrowing Capacity								$ 30,000
Line Of Credit Facility, Maximum Liquidity Requirements At All Other Times								6,800
Line of Credit Facility, Current Borrowing Capacity								17,000
Line of Credit [Member] | Midcap Credit Facility [Member] | Subsequent Event [Member] | Maximum [Member]
Debt Instrument, Fee Amount								100
Line of Credit [Member] | Midcap Credit Facility [Member] | Term Secured Overnight Financing Rate [Member]
Debt Instrument, Basis Spread on Variable Rate					0.10%
Line of Credit [Member] | Midcap Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate					5.50%
Asset Backed Credit Facility [Member] | Midcap Credit Facility [Member] | Subsequent Event [Member] | Maximum [Member]
Debt Instrument, Fee Amount								$ 100