Summary of Significant Accounting Policies (Warranty Reserve) (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Apr. 30, 2017 units	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)
Warranty reserve, provisions and claims
Beginning balance		$ 145	$ 126	$ 116
Provision		1,733	490	377
Claims		(1,361)	(471)	(367)
Ending balance		517	$ 145	$ 126
Pump recall disclosures
Number of recalled pumps | units	900
Recall expense, inventory reserve		1,535
Recall replacement costs and reserves		$ 1,378