Note 19 - Redeemable Class A Preferred Stock (Details Textual) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015 $ / shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2015 $ / shares	Mar. 31, 2017 $ / shares	Mar. 31, 2015 $ / shares	May 13, 2013 $ / shares
Preferred Stock, Shares Outstanding, Ending Balance (in shares) | shares		169,733	182,876
Preferred Stock, Convertible, Conversion Ratio		6.25
Preferred Stock, Convertible, Conversion Price (in dollars per share) | $ / shares		$ 4.00
Conversion of Stock, Amount Issued | $		$ 500	$ 1,381
Convertible Preferred Stock, Shares Issued upon Conversion (in shares) | shares		1,060,831
Preferred Stock, Dividend Rate, Per-Dollar-Amount (in dollars per share) | $ / shares	$ 1.25			$ 1.875
Preferred Stock, Redemption Price Per Share (in dollars per share) | $ / shares					$ 28.75	$ 25.00
Preferred Stock, Redemption Amount | $		$ 6,500	6,700
Mandatorily Redeemable Preferred Stock, Fair Value Disclosure | $		$ 2,300	$ 2,100
Preferred Class A [Member]
Preferred Stock, No Par Value (in dollars per share) | $ / shares							$ 0
Preferred Stock Converted into Common Stock [Member]
Conversion of Stock, Shares Converted (in shares) | shares		13,143	40,000
Conversion of Stock, Shares Issued (in shares) | shares		82,143	250,000
Conversion of Stock, Amount Issued | $		$ 300	$ 1,000