Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 3,024	$ (1,964)	$ 4,036	$ (1,383)
Other comprehensive income (loss):
Foreign currency translation adjustments	127	141	140	191
Unrealized gain (loss) on interest rate hedge	(153)	(127)	(258)	(127)
Unrealized gain (loss) on securities:
Arising during the period	(4)	(53)	30	(54)
Reclassification to net income (loss)	(3)		(8)	(7)
Net unrealized gain (loss)	(7)	(53)	22	(61)
Other comprehensive income (loss):	(33)	(39)	(96)	3
Comprehensive income (loss)	$ 2,991	$ (2,003)	$ 3,940	$ (1,380)