Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Cash Flows From Operating Activities
Net loss	$ (25,504)	$ (40,209)	$ (35,448)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	18,296	19,493	20,564
Share-based compensation	12,638	13,930	11,313
Amortization of debt issuance costs	1,728	1,503	1,408
Amortization and accretion of investment premiums/discounts	801	1,018	1,584
Accretion of interest on long term debt	6,321	7,241	5,105
Provision for bad debt	127	(14)	(707)
Provision for write-down of inventories	2,444	1,507	2,836
Loss on disposal of property and equipment	153	62	666
Loss on extinguishment of debt	965
Provision (benefit) for deferred income taxes	(404)	664	92
Changes in assets and liabilities:
Restricted cash	2,660	(2,353)	(163)
Accounts receivable	22,951	(8,331)	(14,786)
Inventories	(10,502)	(21,094)	(8,341)
Prepaid expenses and other assets	(5,988)	2,271	(5,241)
Deferred cost of revenue	1,452	7,776	(4,875)
Accounts payable	2,404	(1,822)	(1,057)
Accrued liabilities	(1,944)	(8,614)	21,696
Customer advances	2,578	577	1,744
Deferred revenue	2,362	9,662	3,956
Net cash provided by (used in) operating activities	33,538	(16,733)	346
Cash Flows From Investing Activities
Purchases of property and equipment, net	(8,066)	(10,445)	(11,931)
Purchases of investments	(64,356)	(107,162)	(44,155)
Sales and maturities of investments	80,684	121,296	64,578
Net cash provided by investing activities	8,262	3,689	8,492
Cash Flows From Financing Activities
Proceeds from issuance of common stock	3,849	6,555	9,054
Repayments of debt	(66,406)		(417)
Proceeds from debt, net of costs	64,632
Taxes paid related to net share settlement of equity awards	(2,832)	(660)	(260)
Net cash provided by (used in) financing activities	(757)	5,895	8,377
Effect of exchange rate changes on cash and cash equivalents	(823)	(5,646)	1,818
Net increase (decrease) in cash and cash equivalent	40,220	(12,795)	19,033
Cash and cash equivalents at beginning of period	79,551	92,346	73,313
Cash and cash equivalents at end of period	119,771	79,551	92,346
Supplemental Disclosure of Cash Flow Information
Cash paid for income taxes	1,026	3,184	2,499
Cash paid for interest	10,340	7,207	8,208
Non-cash financing activity:
Exchange of Convertible Notes (Note 13)			7,844
Purchases of property and equipment recorded in accounts payable and accrued liabilities	218	$ 638	$ 1,142
Transfers of equipment to inventory	$ 1,660