Accounts and Notes Receivable, net - Allowance For Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning Balance	$ (714,000)	$ (643,000)	$ (651,000)
Recovery			(8,000)
Provision	(325,000)	(71,000)	8,000
Write-offs	318,000	0
Ending Balance	$ (721,000)	$ (714,000)	$ (643,000)