Commitments and contingencies (Narrative) (Details)	9 Months Ended
	Mar. 31, 2016 USD ($)
Commitments And Contingencies 1	$ 211,000
Commitments And Contingencies 2	25,000
Commitments And Contingencies 3	200,000.0
Commitments And Contingencies 4	300,000.0
Commitments And Contingencies 5	600,000.0
Commitments And Contingencies 6	$ 1,400,000.0