Revenue Recognition and Sales Commissions - Schedule of Revenues Included in Continuing Operations Disaggregated by Revenue Source (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Total revenues, net	$ 65,187	$ 54,858
Workforce Solutions [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	54,295	44,947
Provider Solutions [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	10,892	9,911
Subscription SaaS Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	61,885	52,734
Subscription SaaS Services [Member] | Workforce Solutions [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	52,805	43,702
Subscription SaaS Services [Member] | Provider Solutions [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	9,080	9,032
Professional Services [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	3,302	2,124
Professional Services [Member] | Workforce Solutions [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	1,490	1,245
Professional Services [Member] | Provider Solutions [Member]
Disaggregation Of Revenue [Line Items]
Total revenues, net	$ 1,812	$ 879