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Revenue Recognition and Sales Commissions - Schedule of Revenues Included in Continuing Operations from Contracts with Customers Disaggregated by Revenue Source (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | $ 62,450 | $ 59,925 | $ 191,417 | $ 171,791
Workforce Solutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 51,023 | 49,128 | 157,739 | 141,043
Provider Solutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 11,427 | 10,797 | 33,678 | 30,748
Subscription SaaS Services [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 58,999 | 56,160 | 181,276 | 163,304
Subscription SaaS Services [Member] | Workforce Solutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 49,339 | 47,639 | 153,035 | 137,083
Subscription SaaS Services [Member] | Provider Solutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 9,660 | 8,521 | 28,241 | 26,221
Professional Services [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 3,451 | 3,765 | 10,141 | 8,487
Professional Services [Member] | Workforce Solutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | 1,684 | 1,489 | 4,704 | 3,960
Professional Services [Member] | Provider Solutions [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues, net | $ 1,767 | $ 2,276 | $ 5,437 | $ 4,527

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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