Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income [Member]	Accumulated Deficit [Member]	Common Class A [Member]	Common Class B [Member]	Total
Balance, Shares at Dec. 31, 2018	43,721,000	34,303,000
Balance at Dec. 31, 2018	$ 437	$ 343	$ 415,281	$ 1,502	$ (101,326)			$ 316,237
Net income (loss)					(8,396)			(8,396)
Other comprehensive income (loss)				760				760
Stock issuances, net, Shares	18,000
Stock issuances, net			1,157					1,157
Taxes paid related to net settlement upon vesting of equity awards			(51)					(51)
Cash dividends declared			2		(9,368)			(9,366)
Stock-based compensation			12,828					12,828
Balance, Shares at Mar. 31, 2019	43,739,000	34,303,000
Balance at Mar. 31, 2019	$ 437	$ 343	429,217	2,262	(119,090)			313,169
Balance, Shares at Dec. 31, 2019	46,181,000	31,099,000				46,181,320	31,099,011
Balance at Dec. 31, 2019	$ 462	$ 311	405,353	2,864	(133,664)			275,326
Net income (loss)					26,173			26,173
Other comprehensive income (loss)				(2,028)				(2,028)
Stock issuances, net, Shares	130,000
Stock issuances, net	$ 1		1,411					1,412
Taxes paid related to net settlement upon vesting of equity awards			(2,572)					(2,572)
Cash dividends declared					(9,289)			(9,289)
Stock-based compensation			13,065					13,065
Balance, Shares at Mar. 31, 2020	46,311,000	31,099,000				46,311,161	31,099,011
Balance at Mar. 31, 2020	$ 463	$ 311	$ 417,257	$ 836	$ (116,780)			$ 302,087