Note 17 - Income (Loss) Per Share - Basic and Diluted Per Share Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income (loss)													$ 26,106	$ (3,937)	$ (15,974)
Net income attributable to noncontrolling interest													1,207	123	550
Net income (loss) attributable to common stockholders	$ 6,996	[1],[2]	$ 16,129	[1],[2]	$ 615	[1],[2]	$ 1,159	[1],[2]	$ 9,499	$ (675)	$ (8,452)	$ (4,432)	$ 24,899	$ (4,060)	$ (16,524)
Basic weighted average of outstanding shares of common stock (in shares)													29,470	6,385	6,385
Dilutive effect of equity awards (in shares)													663
Diluted weighted average of outstanding shares of common stock (in shares)													30,133	6,385	6,385
Basic earnings (loss) per share (in dollars per share)	$ 0.14		$ 0.33		$ 0.04		$ 0.18		$ 1.49	$ (0.11)	$ (1.32)	$ (0.69)	$ 0.84	$ (0.64)	$ (2.59)
Diluted earnings (loss) per share (in dollars per share)	$ 0.14		$ 0.33		$ 0.04		$ 0.18		$ 1.49	$ (0.11)	$ (1.32)	$ (0.69)	$ 0.83	$ (0.64)	$ (2.59)

[1] Fourth quarter 2018 results include an impairment charge of $1.8 million related to equity method investments.

[2] Fourth quarter 2018 results include an impairment charge of $10.7 million related to assets of business held for sale.