Business Acquisition, Purchase Price and Fair Values of Identifiable Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended		1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Aug. 01, 2013 Connect2Field
Purchase consideration:
Total purchase price, net of cash acquired	$ 6,786		$ 6,786
Cash acquired			149
Total purchase consideration			6,935
Assets acquired and liabilities assumed:
Cash			149
Accounts receivable			3
Identifiable intangible assets			3,038
Goodwill	28,706	24,879	3,827
Total assets acquired, inclusive of goodwill			7,017
Accounts payable, accrued expenses and other current liabilities			(63)
Deferred revenue			(19)
Total liabilities assumed			(82)
Total			$ 6,935