Note 15 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	6 Months Ended	12 Months Ended
	Dec. 22, 2022	Aug. 26, 2020	Dec. 31, 2022	Jun. 30, 2022	Dec. 31, 2020	Mar. 10, 2023	Sep. 30, 2022	Dec. 31, 2021
Common Stock, Par or Stated Value Per Share (in dollars per share)							$ 0.01	$ 0.01
Preferred Stock, Par or Stated Value Per Share (in dollars per share)							$ 0.01	$ 0.01
Series A Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)		$ 0.01
Preferred Stock, Dividend Rate, Percentage		7.00%		7.00%
Series A Preferred Stock [Member] | Signature Bank Non-cumulative Perpetual Series A Preferred Stock [Member]
Payments to Purchase Preferred Stock					$ 5,000
Preferred Stock, Dividend Rate, Percentage					5.00%
Preferred Stock Investment, Fair Value							$ 3,500
Subsequent Event [Member] | Warrant to Castle Creek Capital [Member]
Class of Warrant or Right, Unissued (in shares)						1,300,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)						$ 2.25
Warrants and Rights Outstanding, Term (Year)						7 years
Subsequent Event [Member] | Private Placement [Member]
Equity Offering, Maximum Amount						$ 125,000
Equity Offering, Price Per Share (in dollars per share)						$ 2.25
Common Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.01
Preferred Stock, Percentage of Maximum Outstanding Stock Owned Upon Conversion						9.90%
Subsequent Event [Member] | Private Placement [Member] | Series B Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.01
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)						10
Subsequent Event [Member] | Private Placement [Member] | Nonvoting Common Stock [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.01
Subsequent Event [Member] | Private Placement [Member] | Affiliates of Castle Creek Capital [Member]
Equity Offering, Maximum Amount						$ 60,725
Subsequent Event [Member] | Private Placement [Member] | Other Accredited Investors [Member]
Equity Offering, Maximum Amount						34,275
Subsequent Event [Member] | Private Placement [Member] | Cohen Private Ventures [Member]
Equity Offering, Maximum Amount						$ 30,000
Subsequent Event [Member] | Agency Debenture Bonds [Member]
Debt Securities, Available-for-Sale, Transfer to Held to Maturity			$ 90,000
Debt Securities, Available for Sale, Transfer to Held to Maturity, Unrealized Loss Recognized as Discount			29,000
Debt Securities, Available for Sale, Transfer, Unrealized Gain (Loss)			$ 0
Interim Chief Executive Officer [Member] | Subsequent Event [Member]
Severance Costs	$ 1,590