UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Class B	Preferred Stock	Preferred Stock Preferred Class B	Common Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Preferred Class B	AOCI Attributable to Parent [Member]	Accumulated Foreign Currency Adjustment Attributable to Parent [Member]	Retained Earnings [Member]	Parent [Member]	Parent [Member] Preferred Class B	Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 56,840				$ 37	$ 641,930		$ (61,118)		$ (524,009)	$ 56,840		$ 0
Shares, Outstanding at Dec. 31, 2018					37,728
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					190
Stock Issued During Period, Value, Stock Options Exercised	(271)					(271)					(271)
Adjustments to Additional Paid in Capital, Other	(776)					(1,346)					(1,346)		570
Stock-based compensation	1,384					1,384					1,384
Foreign currency translation adjustments	(87)								$ (87)		(87)
Net loss										1,533	1,533		(319)
Stockholders' Equity, Other	(450)					(362)					(362)		(88)
Shares, Outstanding at Mar. 31, 2019					37,918
Net income (loss) including noncontrolling interests	1,214
Shares, Outstanding at Dec. 31, 2018					37,728
Foreign currency translation adjustments	(579)
Net loss	(7,669)
Net Income (Loss) Attributable to Noncontrolling Interest	(572)
Proceeds from issuance of preferred stock	0
Shares, Outstanding at Jun. 30, 2019					38,049
Net income (loss) including noncontrolling interests	(8,241)
Other Comprehensive Income (Loss), Net of Tax	(579)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	58,754				$ 37	642,059		(61,205)		(522,476)	58,415		339
Shares, Outstanding at Mar. 31, 2019					37,918
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					131
Stock Issued During Period, Value, Stock Options Exercised	128
Stock-based compensation	533					533					533
Foreign currency translation adjustments	(492)								(492)		(492)
Net loss	(9,202)									(9,202)			(253)
Net Income (Loss) Attributable to Noncontrolling Interest	(253)
Shares, Outstanding at Jun. 30, 2019					38,049
Net income (loss) including noncontrolling interests	(9,455)
Stockholders Equity, Capital Transaction Of Equity Method Investee	128					128
Other Comprehensive Income (Loss), Net of Tax	(492)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	49,468				$ 37	642,720		(61,697)		(531,678)	49,382		86
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	38,273		$ 0		$ 38	644,070		(61,323)		(544,010)	38,775		(502)
Shares, Outstanding at Dec. 31, 2019			0		38,227
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					4
Stock Issued During Period, Value, Stock Options Exercised	0					0					0
Stock-based compensation	380					380					380
Foreign currency translation adjustments	(907)								(907)		(907)
Net loss										(4,642)	(4,642)
Net Income (Loss) Attributable to Noncontrolling Interest													(47)
Shares, Outstanding at Mar. 31, 2020			8,065		38,231
Net income (loss) including noncontrolling interests	(4,689)
Issuance of Preferred B Stock (in shares)				8,065
Issuance of Preferred B Stock		$ 10,000		$ 8			$ 9,992					$ 10,000
Shares, Outstanding at Dec. 31, 2019			0		38,227
Foreign currency translation adjustments	(387)
Net loss	(9,754)
Net Income (Loss) Attributable to Noncontrolling Interest	(489)
Proceeds from issuance of preferred stock	10,000
Shares, Outstanding at Jun. 30, 2020			8,065		38,254
Net income (loss) including noncontrolling interests	(10,243)
Other Comprehensive Income (Loss), Net of Tax	(387)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	43,057		$ 8		$ 38	654,442		(62,230)		(548,652)	43,606		(549)
Shares, Outstanding at Mar. 31, 2020			8,065		38,231
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period					(23)
Stock Issued During Period, Value, Stock Options Exercised	(5)					(5)					(5)
Stock-based compensation	323					323					323
Foreign currency translation adjustments	520								$ 520		520
Net loss										(5,112)	(5,112)
Net Income (Loss) Attributable to Noncontrolling Interest	(442)												(442)
Shares, Outstanding at Jun. 30, 2020			8,065		38,254
Net income (loss) including noncontrolling interests	(5,554)
Other Comprehensive Income (Loss), Net of Tax	520
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 38,341		$ 8		$ 38	$ 654,760		$ (61,710)		$ (553,764)	$ 39,332		$ (991)