Segment Information - Additional Information (Detail)	3 Months Ended								12 Months Ended
	Dec. 31, 2015 USD ($) business	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) business segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Segment Reporting Information [Line Items]
Number of reporting segments | segment									2
Number businesses owned | business	4								4
Revenue	$ 35,153,000	$ 34,140,000	$ 33,536,000	$ 30,592,000	$ 26,624,000	$ 20,762,000	$ 19,029,000	$ 18,422,000	$ 133,421,000	$ 84,837,000	$ 59,201,000
Income (loss) from discontinued operations, including gain on sale, net of tax (less than)	$ 0	$ 0	$ 0	$ 0	$ 10,237,000	$ 2,426,000	$ 1,315,000	$ 48,000	0	14,026,000	232,339,000
Procurian
Segment Reporting Information [Line Items]
Income (loss) from discontinued operations, including gain on sale, net of tax (less than)										100,000.0
Europe and Canada
Segment Reporting Information [Line Items]
Revenue									$ 6,300,000	$ 2,500,000	$ 2,500,000