Accounts and notes receivable (Narrative) (Details)	9 Months Ended
	Mar. 31, 2016 d
Accounts And Notes Receivable 1	15.00%
Accounts And Notes Receivable 2	180
Accounts And Notes Receivable 3	60.00%
Accounts And Notes Receivable 4	75.00%
Accounts And Notes Receivable 5	100.00%