Note 10 - Earnings (Loss) Per Share - Computation of Basic and Diluted Earnings per Share (Details) $ / shares in Units, $ in Thousands	3 Months Ended							6 Months Ended	9 Months Ended
	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) shares	Mar. 31, 2023 USD ($)	Jun. 20, 2023 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) item $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares
EARNINGS (LOSS) PER SHARE
Net income (loss) | $	$ (239)	$ 5,541	$ 2,032		$ 19,462	$ 7,556	$ 25,257	$ 31,382	$ 7,334	$ 52,275
Forfeitable Dividends Declared on Unvested Stock Based Awards | $	$ 438								$ 736
Weighted average shares used to compute basic EPS (in shares)								44,344
Weighted average shares used to compute diluted EPS (in shares)								44,752
Basic (in dollars per share) | $ / shares	$ (0.03)				$ 0.41			$ 0.71	$ 0.05	$ 1.15
Diluted (in dollars per share) | $ / shares	$ (0.03)				$ 0.40			$ 0.70	$ 0.05	$ 1.14
Share in dividends for unvested restricted stock awards with common shares | item									1
Employee Stock Option [Member]
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)								381
Restricted Stock Units
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)										684,000
Antidilutive shares	718
Performance Stock Units
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)								27		249,000
Antidilutive shares	1,057
Class A Common Stock
EARNINGS (LOSS) PER SHARE
Net income (loss) | $	$ (1,245)			$ 18,616	$ 17,288	$ 17,288			$ 2,085	$ 18,616
Weighted average shares used to compute basic EPS (in shares)	43,378			42,044	42,144				42,827
Weighted average shares used to compute diluted EPS (in shares)	43,378			42,708	42,883				43,346
Basic (in dollars per share) | $ / shares	$ (0.03)			$ 0.44	$ 0.41				$ 0.05	$ 0.44
Diluted (in dollars per share) | $ / shares	$ (0.03)			$ 0.44	$ 0.40				$ 0.05	$ 0.44
Antidilutive shares	649				166
Class A Common Stock | Q2 Dividends Declared
EARNINGS (LOSS) PER SHARE
Date dividends declared									Sep. 30, 2024
Class A Common Stock | Performance Stock Units
EARNINGS (LOSS) PER SHARE
Antidilutive shares					153	249
Class A Common Stock | Employee Stock Option [Member]
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)				339,000	352,000				172
Class A Common Stock | Restricted Stock Units
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)				62,000	85,000				64
Class A Common Stock | Performance Stock Units
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)				263,000	302,000				283
Class B Common Stock
EARNINGS (LOSS) PER SHARE
Net income (loss) | $	$ 507			$ 1,395	$ 1,395				$ 4,079	$ 1,395
Weighted average shares used to compute basic EPS (in shares)	8,684			8,412	8,432				8,574
Weighted average shares used to compute diluted EPS (in shares)	8,970			8,642	8,686				8,855
Basic (in dollars per share) | $ / shares	$ 0.06			$ 0.17	$ 0.17				$ 0.48	$ 0.17
Diluted (in dollars per share) | $ / shares	$ 0.06			$ 0.16	$ 0.16				$ 0.46	$ 0.16
Antidilutive shares									0
Class B Common Stock | Q2 Dividends Declared
EARNINGS (LOSS) PER SHARE
Date dividends declared									Sep. 30, 2024
Class B Common Stock | Employee Stock Option [Member]
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)	85			97,000	103,000				91
Class B Common Stock | Restricted Stock Units
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)	35			41,000	49,000				31
Class B Common Stock | Performance Stock Units
EARNINGS (LOSS) PER SHARE
Dilutive effect of stock-based awards (in shares)	166			92,000	102,000				159
Antidilutive shares					31	50
Class A Restricted Stock
EARNINGS (LOSS) PER SHARE
Net income (loss) | $	$ 52					$ 721			$ 282	$ 824
Class B Restricted Stock
EARNINGS (LOSS) PER SHARE
Net income (loss) | $	$ 9				$ 58				$ 152	$ 58