Restructuring - Schedule of Costs in Results of Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 515
Cost of revenue-service [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	163
Selling, general and administrative [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	221
Research and development [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	$ 131