Acquisitions - Narrative (Details) - USD ($) $ in Thousands			1 Months Ended		3 Months Ended		9 Months Ended
	Feb. 05, 2018	Oct. 26, 2016	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Business Acquisition [Line Items]
Cash paid							$ 2,600	$ 0
Goodwill			$ 76,016		$ 76,016		$ 76,016		$ 51,248
Effective income tax rate (as a percent)					23.70%	30.40%	28.20%	33.50%
Acquisition of Technology [Member]
Business Acquisition [Line Items]
Consideration transferred			5,000
Cash paid			4,500
Future contingent consideration payment			500		$ 500		$ 500
Finite-lived intangible assets acquired			1,000		1,000		1,000
Goodwill			4,000		4,000		4,000
Apex Optimisation
Business Acquisition [Line Items]
Consideration transferred	$ 23,000
Cash paid	$ 18,400
Future contingent consideration payment			4,600		4,600		4,600
Goodwill			16,579		16,579		$ 16,579
Weighted average discount rate (as a percent)							28.00%
Effective income tax rate (as a percent)							21.00%
RtTech Software, Inc. [Member]
Business Acquisition [Line Items]
Consideration transferred				$ 12,000
Cash paid				$ 10,800
Future contingent consideration payment			1,200		1,200		$ 1,200
Finite-lived intangible assets acquired			8,000		8,000		8,000
Goodwill			4,000		4,000		4,000
Mtelligence Corporation
Business Acquisition [Line Items]
Consideration transferred		$ 37,400
Cash paid		31,900
Future contingent consideration payment		5,500
Fair value of contingent consideration		$ 5,300
Goodwill			25,888		25,888		$ 25,888
Weighted average discount rate (as a percent)							19.00%
Effective income tax rate (as a percent)							34.00%
Developed Technology Rights | Acquisition of Technology [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life							3 years
Developed Technology Rights | Apex Optimisation
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			4,400		4,400		$ 4,400
Finite-lived intangible asset, useful life							7 years
Developed Technology Rights | RtTech Software, Inc. [Member]
Business Acquisition [Line Items]
Finite-lived intangible asset, useful life							7 years
Developed Technology Rights | Mtelligence Corporation
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			11,385		11,385		$ 11,385
Finite-lived intangible asset, useful life							12 years
Customer Relationship | Apex Optimisation
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			3,500		3,500		$ 3,500
Finite-lived intangible asset, useful life							7 years
Customer Relationship | Mtelligence Corporation
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			679		679		$ 679
Finite-lived intangible asset, useful life							6 years
Non-compete Agreements | Mtelligence Corporation
Business Acquisition [Line Items]
Finite-lived intangible assets acquired			$ 553		$ 553		$ 553
Finite-lived intangible asset, useful life							3 years