Segment Information - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011
Revenues From External Customers And Long Lived Assets [Line Items]
Number of reporting segments									2
Revenue	$ 17,680	$ 16,071	$ 13,476	$ 11,974	$ 9,031	$ 7,998	$ 5,400	$ 4,211	$ 59,201	$ 26,640	$ 12,885
Europe
Revenues From External Customers And Long Lived Assets [Line Items]
Revenue									$ 2,500	$ 1,000	$ 600
Procurian
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Dec. 04, 2013
Channel Intelligence
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Feb. 20, 2013
Investor Force
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Jan. 29, 2013
WhiteFence
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Oct. 28, 2013
Free Border
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Oct. 18, 2013
Go Industry
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Jul. 05, 2012
Click Equations
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Jun. 14, 2011
Metastorm
Revenues From External Customers And Long Lived Assets [Line Items]
Segments disposal date									Feb. 17, 2011