Accounts and Notes Receivable, net - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	$ 4,446	$ 2,636
Earnout Receivable [Member] | Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Other receivables	$ 300	$ 400