Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
BASE24
Segment Reporting Information [Line Items]
Percentage of total revenues from licensing BASE24 product line	21.00%	21.00%	28.00%
Customer Concentration Risk
Segment Reporting Information [Line Items]
Percentage of revenues during the years ended December 31, 2015, 2014 and 2013	No single customer accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2015, 2014 and 2013.
Geographic Concentration Risk
Segment Reporting Information [Line Items]
Percentage of revenues during the years ended December 31, 2015, 2014 and 2013	No country outside of the United States accounted for more than 10% of the Company's consolidated revenues during the years ended December 31, 2015, 2014 and 2013.