Fair Value Measurements (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Mar. 21, 2018	Dec. 31, 2017	Jul. 12, 2017
Level 2 [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of debt	$ 161,900		$ 113,800
Waterfall International Inc. [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout consideration liability				$ 3,000
Interfax Communications Limited [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, fair value		$ 5,000
Recurring Measurement Basis [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout consideration liability	2,037		3,576
Recurring Measurement Basis [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout consideration liability	0		0
Recurring Measurement Basis [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout consideration liability	0		0
Recurring Measurement Basis [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Earnout consideration liability	2,037		3,576
Recurring Measurement Basis [Member] | Level 3 [Member] | Earnout Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	3,576
Additions - cash earnouts	439
Settlements - cash earnouts	(1,978)
Ending balance	2,037
Recurring Measurement Basis [Member] | RightAnswers, Inc. [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, fair value			$ 2,000
Recurring Measurement Basis [Member] | Waterfall International Inc. [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, fair value	1,600
Recurring Measurement Basis [Member] | Interfax Communications Limited [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration, fair value	$ 800