Note 16 - Quarterly Results of Operations (Unaudited) - Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Total revenues	$ 225,229	$ 210,830	$ 191,689	$ 210,813	$ 230,555	$ 220,459	$ 217,040	$ 217,333	$ 838,561	$ 885,387	$ 880,417
Operating (loss) income	9,566	6,811	(28,950)	(1,454)	1,663	(3,870)	7,030	3,946	(14,027)	8,769	55,416
(Loss) income from continuing operations	11,615	6,052	(30,504)	(4,087)	258	(4,042)	5,245	3,758	(14,120)	5,219	40,860
(Loss) income from discontinued operations	(33,082)	2,788	825	871	904	853	826	675	(28,598)	3,258	1,643
Net Income (Loss) Attributable to Parent, Total	$ (25,663)	$ 7,501	$ (22,343)	$ (2,213)	$ 1,162	$ (3,189)	$ 6,071	$ 4,433	$ (42,718)	$ 8,477	$ 42,503
us-gaap_EarningsPerShareAbstract
(Loss) income from continuing operations (in dollars per share)	$ 0.43	$ 0.28	$ (1.36)	$ (0.17)	$ 0.01	$ (0.22)	$ 0.28	$ 0.20	$ (0.81)	$ 0.28	$ 2.23
Income (loss) from discontinued operations (in dollars per share)	(1.93)	0.16	0.05	0.05	0.05	0.05	0.04	0.04	(1.65)	0.18	0.09
Net (loss) income (in dollars per share)	(1.50)	0.44	(1.31)	(0.12)	0.06	(0.17)	0.33	0.24	(2.46)	0.46	2.32
Diluted (loss) income per share:
(Loss) income from continuing operations (in dollars per share)	0.43	0.27	(1.36)	(0.17)	0.01	(0.22)	0.28	0.20	(0.81)	0.28	2.21
(Loss) income from discontinued operations (in dollars per share)	(1.93)	0.16	0.05	0.05	0.05	0.05	0.04	0.04	(1.65)	0.17	0.09
Earnings Per Share, Diluted, Total (in dollars per share)	$ (1.50)	$ 0.43	$ (1.31)	$ (0.12)	$ 0.06	$ (0.17)	$ 0.33	$ 0.24	$ (2.46)	$ 0.45	$ 2.30
Total revenues	$ 225,229	$ 210,830	$ 191,689	$ 210,813	$ 230,555	$ 220,459	$ 217,040	$ 217,333	$ 838,561	$ 885,387	$ 880,417
Operating (loss) income	9,566	6,811	(28,950)	(1,454)	1,663	(3,870)	7,030	3,946	(14,027)	8,769	55,416
(Loss) income from continuing operations	11,615	6,052	(30,504)	(4,087)	258	(4,042)	5,245	3,758	(14,120)	5,219	40,860
(Loss) income from discontinued operations	(33,082)	2,788	825	871	904	853	826	675	(28,598)	3,258	1,643
Net Income (Loss) Attributable to Parent, Total	$ (25,663)	$ 7,501	$ (22,343)	$ (2,213)	$ 1,162	$ (3,189)	$ 6,071	$ 4,433	$ (42,718)	$ 8,477	$ 42,503