Summary of Gross Carrying Amount and Accumulated Amortization for Intangible Assets Resulting from Acquisitions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Cost:
Beginning Balance	$ 15,917	$ 15,902
Currency translation adjustment		15
Ending Balance	15,917	15,917
Accumulated Amortization:
Beginning Balance	(5,733)	(4,226)
Amortization expense	(363)	(1,491)
Currency translation adjustment		(16)
Ending Balance	(6,096)	(5,733)
Intangible assets, net	9,821	10,184	[1]
Existing Technology
Cost:
Beginning Balance	4,600	4,600
Ending Balance	4,600	4,600
Accumulated Amortization:
Beginning Balance	(1,466)	(1,125)
Amortization expense	(112)	(341)
Ending Balance	(1,578)	(1,466)
Intangible assets, net	3,022	3,134
Amortization period	11 years 9 months
Customer Relationship
Cost:
Beginning Balance	10,747	10,732
Currency translation adjustment		15
Ending Balance	10,747	10,747
Accumulated Amortization:
Beginning Balance	(3,697)	(2,816)
Amortization expense	(251)	(865)
Currency translation adjustment		(16)
Ending Balance	(3,948)	(3,697)
Intangible assets, net	6,799	7,050
Customer Relationship | Minimum
Accumulated Amortization:
Amortization period	4 years
Customer Relationship | Maximum
Accumulated Amortization:
Amortization period	11 years 9 months
Trade Names
Cost:
Beginning Balance	570	570
Ending Balance	570	570
Accumulated Amortization:
Beginning Balance	(570)	(285)
Amortization expense		(285)
Ending Balance	$ (570)	$ (570)
Amortization period	1 year

[1] The condensed consolidated balance sheet has been derived from the audited consolidated financial statements at December 31, 2013 but does not include all the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.