Segment Information - Summary of Financial Information for Companies Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 31,824	$ 32,915
Cost of revenue	16,506	15,535
Segment Adjusted EBITDA	1,704	611
Portal & Advertising [Member]
Segment Reporting Information [Line Items]
Revenue	20,666	22,230
Software & Services [Member]
Segment Reporting Information [Line Items]
Revenue	11,158	10,685
Operating Segments
Segment Reporting Information [Line Items]
Revenue	31,824	32,915
Cost of revenue	16,506	15,535
Segment Adjusted EBITDA	1,704	611
Operating Segments | Portal & Advertising [Member]
Segment Reporting Information [Line Items]
Revenue	20,666	22,230
Cost of revenue	13,003	12,427
Segment Adjusted EBITDA	2,621	3,048
Operating Segments | Software & Services [Member]
Segment Reporting Information [Line Items]
Revenue	11,158	10,685
Cost of revenue	3,503	3,108
Segment Adjusted EBITDA	2,794	2,497
Operating Segments | Corporate Unallocated Expenses [Member]
Segment Reporting Information [Line Items]
Segment Adjusted EBITDA	$ (3,711)	$ (4,934)