Note 17 - Equity (Details Textual) $ / shares in Units, $ in Thousands			3 Months Ended
	Mar. 10, 2020 $ / shares shares	Dec. 23, 2019 $ / shares shares	Mar. 31, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares	Dec. 31, 2023 $ / shares shares	Oct. 05, 2023 USD ($)	Dec. 01, 2020 USD ($)
Preferred Stock, Shares Outstanding, Ending Balance (in shares)			27,413,098		27,413,098
Preferred Stock, Shares Authorized (in shares)			50,000,000		50,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 0.001		$ 0.001		$ 0.001
Preferred Stock, Shares Issued, Total (in shares)			27,413,098		27,413,098
Equity Agreement [Member] | Northland Capital Markets [Member] | Maximum [Member]
Aggregate Offering Price | $							$ 75,000
Equity Distribution Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)			0
Sale of Stock, Maximum Shares Permitted by SEC | $						$ 4,712
Sale of Stock, Commission, Percent						2.50%
Additional Paid-in Capital [Member]
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary | $			$ 447	$ 582
AOCI Attributable to Parent [Member]
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary | $			(10)	(12)
Noncontrolling Interest [Member]
Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary | $			$ (437)	$ (570)
The 2020 Rights Agreement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	100
Repurchase of Warrants, Price per Share (in dollars per share) | $ / shares	200
Share Price (in dollars per share) | $ / shares	$ 20
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	10
Voting Power, Percentage	50.00%
Percentage of Purchase Price Required for Adjustments	1.00%
Number of Fractal Units Issued (in shares)	0
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares	$ 0.001
Series E Preferred Stock [Member]
Ratio of Shares To Vote			10
Preferred Stock, Shares Outstanding, Ending Balance (in shares)			4,983,557
Preferred Stock, Shares Issued, Total (in shares)			4,983,557
Series F Preferred Stock [Member]
Ratio of Shares To Vote		10
Preferred Stock, Shares Authorized (in shares)		25,000,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares		$ 0.001
Preferred Stock, Shares Issued, Total (in shares)					22,429,541
Series F Preferred Stock [Member] | Mr. Cohen [Member]
Stock Issued During Period, Shares, New Issues (in shares)		12,549,273
Series F Preferred Stock [Member] | DGC Trust [Member]
Stock Issued During Period, Shares, New Issues (in shares)		9,880,268
Series C Junior Participating Preferred Stock [Member]
Preferred Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	0.001
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 100
Class of Warrant or Right, Exercise Trigger, Percentage of Common Stock Owned by Individual or Affiliates	4.95%
Common Stock [Member]
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ / shares			$ 0.25	$ 0.25