Consolidated Statements of Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Restricted Stock Units (RSUs) [Member]	Common Stock [Member] Performance Shares [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Restricted Stock Units (RSUs) [Member]	Performance Shares [Member]	Total
Balance, beginning of period (in shares) at Dec. 31, 2018			31,922,409
Issuance of common stock upon stock option exercises (in shares)			52,783							52,783
Issuance of shares pursuant to restricted stock units (in shares)	171,575	110,656
Issuance of shares pursuant to deferred stock units (in shares)			9,438
Shares repurchased and retired (in shares)			(774,989)
Balance, end of period (in shares) at Mar. 31, 2019			31,491,872
Balance, beginning of period at Dec. 31, 2018			$ 319	$ 122,818	$ 379,890	$ (40,290)	$ 7,450			$ 470,187
Issuance of common stock upon stock option exercises			1	955						956
Issuance of shares pursuant to restricted stock units	$ 2	$ 1						$ 2	$ 1
Shares repurchased and retired			(8)	(14,183)						(14,191)
Balance, end of period at Mar. 31, 2019			$ 315	111,597	375,889	(40,508)	7,277			454,570
Equity-based compensation expense				2,007						2,007
Net income (loss)					(4,001)		10			(3,991)
Currency translation adjustment and derivative transactions, net						(218)	(87)			(305)
Net income (loss)					(4,001)		10			(3,991)
Distributions to non-controlling interests							(96)			(96)
Net loss					(4,001)		10			$ (3,991)
Balance, beginning of period (in shares) at Dec. 31, 2019			30,715,959							30,715,959
Issuance of common stock upon stock option exercises (in shares)			0
Issuance of shares pursuant to restricted stock units (in shares)	152,596	71,541
Issuance of shares pursuant to deferred stock units (in shares)			0
Shares repurchased and retired (in shares)			(260,620)
Balance, end of period (in shares) at Mar. 31, 2020			30,679,476							30,679,476
Balance, beginning of period at Dec. 31, 2019			$ 307	101,148	358,998	(32,694)	7,334			$ 435,093
Issuance of common stock upon stock option exercises			0	0						0
Issuance of shares pursuant to restricted stock units	$ 2	$ 1						$ 2	$ 1
Shares repurchased and retired			(3)	(5,045)						(5,048)
Balance, end of period at Mar. 31, 2020			$ 307	98,103	357,366	(42,947)	7,400			420,229
Equity-based compensation expense				$ 2,000						2,000
Net income (loss)					(1,632)		329			(1,303)
Currency translation adjustment and derivative transactions, net						$ (10,253)	(263)			(10,516)
Net income (loss)					(1,632)		329			(1,303)
Distributions to non-controlling interests							0			0
Net loss					$ (1,632)		$ 329			$ (1,303)