Sale-leaseback - Narrative (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($) Building
Sale Leaseback Transaction [Line Items]
Sale-leaseback transaction, gain recognized in other income	$ 555
Dallas | Buildings and Land
Sale Leaseback Transaction [Line Items]
Sale-leaseback transaction, asset description	Transaction to sell two buildings and land
Transaction to sell, number of buildings | Building		2
Consideration received reduced by closing and transaction costs		$ 8,800
Sale-leaseback transaction, net book value		5,200
Gain on sale-leaseback transaction		3,600
Sale-leaseback transaction, gain recognized in other income		2,500
Sale-leaseback transaction, deferred gain to be recognized	$ 600	$ 1,100
Sale-leaseback transaction, lease terms	The leaseback is an operating lease, and we will pay approximately $0.6 million in rent, excluding executory costs, from April 2017 through December 2017.
Sale-leaseback transaction, future rent payment	$ 600