SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) category	Dec. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)
Significant Accounting Policies [Line Items]
Number of revenue and cost categories (in categories) | category	2
Allowance for doubtful accounts	$ 1,200,000	$ 1,000,000.0
Impaired goodwill	0
Unearned revenue	3,800,000	1,700,000
Cash payments received	10,700,000
Revenues recognized, previously included in deferred revenues	8,500,000
Unbilled revenues	3,400,000	$ 2,500,000
Right of use lease assets, net	10,778,000
Total lease liabilities	$ 11,149,000
Accounting Standards Update 2016-02
Significant Accounting Policies [Line Items]
Right of use lease assets, net			$ 12,600,000
Total lease liabilities			$ 12,900,000
Accounts receivable | Credit concentration risk | LexisNexis Risk Solutions
Significant Accounting Policies [Line Items]
Concentration risk percentage	14.00%	15.00%
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life of intangible asset	3 years
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life of intangible asset	5 years
Furniture and Fixtures
Significant Accounting Policies [Line Items]
Estimated useful lives	8 years
Equipment | Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Equipment | Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives	10 years
Purchased Software | Minimum
Significant Accounting Policies [Line Items]
Estimated useful lives	3 years
Purchased Software | Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Leasehold Improvements | Maximum
Significant Accounting Policies [Line Items]
Estimated useful lives	5 years
Development Services
Significant Accounting Policies [Line Items]
Development services revenues, contract period	1 year
Remaining performance obligation	$ 6,200,000
Subscriptions
Significant Accounting Policies [Line Items]
Remaining performance obligation	$ 17,100,000
Subscriptions | Minimum
Significant Accounting Policies [Line Items]
Performance obligation, description of timing	1
Subscriptions | Maximum
Significant Accounting Policies [Line Items]
Performance obligation, description of timing	5 years
Indiana | State Enterprise Revenues
Significant Accounting Policies [Line Items]
Performance obligation, description of timing	one month