Note 2 - Income (Loss) Per Share - Calculation of Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Numerators:
Income (loss) from continuing operations		$ 8,581	$ (3,084)
Income from discontinued operations		2,559	871
Net income (loss)		$ 11,140	$ (2,213)
Denominator:
Denominator for basic income (loss) per share – weighted-average shares (in shares)		16,954	18,088
Effect of dilutive securities:
Diluted weighted average shares outstanding (in shares)		17,086	18,088
Basic income (loss) per share:
Income (loss) from continuing operations (in dollars per share)		$ 0.51	$ (0.17)
Income from discontinued operations (in dollars per share)		0.15	0.05
Net income (loss) (1) (in dollars per share)	[1]	0.66	(0.12)
Diluted income (loss) per share:
Income (loss) from continuing operations (in dollars per share)		0.50	(0.17)
Income from discontinued operations (in dollars per share)		0.15	0.05
Net income (loss) (1) (in dollars per share)	[1]	$ 0.65	$ (0.12)
Restricted Stock [Member]
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested shares (in shares)		132	0
Share-based Payment Arrangement, Option [Member]
Effect of dilutive securities:
Equivalent shares issuable upon conversion of unvested shares (in shares)		0	0

[1] Sum of the individual amounts may not add due to rounding.