Note 9 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Dividends Payable [Table Text Block]

Declaration Date	Per Common Share		Amount		Payment Date
October 29, 2019 (special)	$	0.40	$	4,608	November 29, 2019
January 27, 2019 (special)		0.08		912	March 15, 2019
January 27, 2019		0.16		1,824	March 15, 2019
	$	0.64	$	7,344

Nonvested Restricted Stock Shares Activity [Table Text Block]

	Shares			Wtd. Avg. Price at Date of Issuance
Nonvested at December 31, 2018		45,486		$	21.61
Granted		1,140,088			7.27
Vested		(227,892	)		9.84
Nonvested at December 31, 2019		957,682			7.34
Vested		(391,410	)		7.53
Nonvested at December 31, 2020		566,272			7.21

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

	Foreign Currency Translation Adjustments			Unrealized Gains (Losses) on Available-For-Sale Investments			Total
Balance, December 31, 2019	$	(1,245	)	$	(19	)	$	(1,264	)
Other comprehensive income		920			8			928
Balance, December 31, 2020	$	(325	)	$	(11	)	$	(336	)