Revenues (Schedule of Effect of Adoption of ASU 2014-09 On Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	$ 212,423	$ 93,115
Inventories	63,867	47,410
Total current assets	427,913	298,842
Other assets	47,642	25,065
Total assets	770,248	459,700
Accrued warranty	12,807	10,584	$ 9,998
Other accrued liabilities	81,153	37,044
Total current liabilities	359,872	213,205
Accumulated deficit	(828,078)	(781,286)
Total stockholders’ equity	112,732	125,678	$ 102,395	$ 104,235
Total liabilities and stockholders’ equity	$ 770,248	459,700
As Reported | ASU 2014-09
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net		120,770
Inventories		45,880
Total current assets		324,967
Other assets		22,586
Total assets		483,346
Accrued warranty		10,007
Other accrued liabilities		36,713
Deferred distributors revenue, net of cost of sales to distributors		43,525
Total current liabilities		255,822
Accumulated deficit		(800,257)
Total stockholders’ equity		106,707
Total liabilities and stockholders’ equity		483,346
Adjustment | ASU 2014-09
Revenue Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net		(27,655)
Inventories		1,530
Total current assets		(26,125)
Other assets		2,479
Total assets		(23,646)
Accrued warranty		577
Other accrued liabilities		331
Deferred distributors revenue, net of cost of sales to distributors		(43,525)
Total current liabilities		(42,617)
Accumulated deficit		18,971
Total stockholders’ equity		18,971
Total liabilities and stockholders’ equity		$ (23,646)