Certain Financial Statement Information (Tables)

9 Months Ended

Dec. 31, 2014

Certain Financial Statement Information [Abstract]

Schedule of Accounts receivable

Accounts receivable, net:

	December 31, 2014			March 31, 2014
	(In thousands)
Accounts receivable	$	19,612		$	25,629
Less: allowance for bad debts	(365		)	(451		)
	$	19,247		$	25,178

Schedule of Inventories

Inventories:

	December 31, 2014		March 31, 2014
	(In thousands)
Finished goods	$	16,618	$	9,375
Work in process	6,494		6,510
Raw materials	1,110		3,061
	$	24,222	$	18,946

Schedule of Other current assets

Other current assets:

	December 31, 2014		March 31, 2014
	(In thousands)
Prepaid expenses	$	12,843	$	10,978
Executive deferred compensation assets	1,108		1,035
Proceeds receivable from sale of strategic investment	—		3,353
Other	1,252		1,433
	$	15,203	$	16,799

Schedule of Property and equipment

Property and equipment:

	Useful Life	December 31, 2014			March 31, 2014
	(In years)	(In thousands)
Machinery and equipment*	3-5	$	39,520		$	44,503
Leasehold improvements	1-5	10,473			11,574
Computers, office furniture and equipment*	3-5	44,581			43,365
		94,574			99,442
Less: accumulated depreciation and amortization*		(73,628		)	(78,696		)
		$	20,946		$	20,746

Schedule of Goodwill

Goodwill is as follows:

	December 31, 2014		March 31, 2014
	(In thousands)
Goodwill	$	11,425	$	11,425

Schedule of Purchased intangible assets

Purchase-related intangibles are as follows:

	December 31, 2014								March 31, 2014
	Gross		Accumulated Amortization and Impairments			Net		Weighted average remaining useful life	Gross		Accumulated Amortization and Impairments			Net		Weighted average remaining useful life
	(In thousands)							(In years)	(In thousands)							(In years)
Developed technology/in-process research and development	$	425,000	$	(425,000	)	$	—	0.0	$	425,000	$	(425,000	)	$	—	0.0
Customer relationships	6,330		(6,330		)	—		0.0	6,330		(6,225		)	105		0.4
Patents/core technology rights/trade name	62,306		(62,306		)	—		0.0	62,306		(62,306		)	—		0.0
	$	493,636	$	(493,636	)	$	—		$	493,636	$	(493,531	)	$	105

Schedule of Other assets

Other assets:

	December 31, 2014		March 31, 2014
	(In thousands)
Non-current portion of prepaid expenses	$	2,957	$	4,235
Strategic investments*	500		3,000
Other	519		519
	$	3,976	$	7,754

Schedule of Other accrued liabilities

Other accrued liabilities:

	December 31, 2014		March 31, 2014
	(In thousands)
Employee related liabilities	$	1,622	$	1,733
Executive deferred compensation	1,385		1,314
Income taxes	1,870		962
Professional fees	755		1,259
Other	3,027		5,609
	$	8,659	$	10,877

Schedule of Cash, cash equivalents and available-for-sale investments by type of instruments

Short-term investments:

The following is a summary of cash, cash equivalents and available-for-sale investments by type of instrument (in thousands):

	December 31, 2014									March 31, 2014
	Amortized Cost		Gross Unrealized					Estimated Fair Value		Amortized Cost		Gross Unrealized					Estimated Fair Value
			Gains		Losses							Gains		Losses
Cash	$	40,828	$	—	$	—		$	40,828	$	65,867	$	—	$	—		$	65,867
Cash equivalents	9,252		—		—			9,252		5,672		—		—			5,672
U.S. Treasury securities and agency bonds	1,475		—		—			1,475		2,838		—		—			2,838
Corporate bonds	10,911		14		(9		)	10,916		10,599		30		(2		)	10,627
Mortgage-backed and asset-backed securities*	1,614		291		(2		)	1,903		1,793		297		(16		)	2,074
Closed-end bond funds	13,249		2,248		(206		)	15,291		14,373		2,392		(402		)	16,363
Preferred stock	2,406		952		—			3,358		2,406		736		—			3,142
	$	79,735	$	3,505	$	(217	)	$	83,023	$	103,548	$	3,455	$	(420	)	$	106,583
Reported as:
Cash and cash equivalents								$	50,080								$	71,539
Short-term investments available-for-sale								32,943									35,044
								$	83,023								$	106,583

* At December 31, 2014 and March 31, 2014, approximately $1.0 million and $1.1 million of the estimated fair value presented were mortgage-backed securities, respectively.

Schedule of Cash, cash equivalents and available-for-sale investments by type of instruments measured at fair value on recurring basis

The following is a summary of cash, cash equivalents and available-for-sale investments by type of instrument measured at fair value on a recurring basis (in thousands):

	December 31, 2014								March 31, 2014
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash	$	40,828	$	—	$	—	$	40,828	$	65,867	$	—	$	—	$	65,867
Cash equivalents	9,252		—		—		9,252		5,672		—		—		5,672
U.S. Treasury securities and agency bonds	1,475		—		—		1,475		2,838		—		—		2,838
Corporate bonds	—		10,916		—		10,916		—		10,627		—		10,627
Mortgage-backed and asset-backed securities	—		1,903		—		1,903		—		2,074		—		2,074
Closed-end bond funds	15,291		—		—		15,291		16,363		—		—		16,363
Preferred stock	—		3,358		—		3,358		—		3,142		—		3,142
	$	66,846	$	16,177	$	—	$	83,023	$	90,740	$	15,843	$	—	$	106,583

Schedule of Cost and estimated fair values of available-for-sale securities with stated maturities by contractual maturity

The following is a summary of the cost and estimated fair values of available-for-sale securities with stated maturities, which include U.S. Treasury securities and agency bonds, corporate bonds and mortgage-backed and asset-backed securities, by contractual maturity (in thousands):

	December 31, 2014
	Cost		Estimated Fair Value
Less than 1 year	$	5,745	$	5,837
Mature in 1 – 2 years	7,147		7,170
Mature in 3 – 5 years	291		305
Mature after 5 years	817		982
	$	14,000	$	14,294

Schedule of Gross unrealized losses

The following is a summary of gross unrealized losses (in thousands):

	Less Than 12 Months of Unrealized Losses					12 Months or More of Unrealized Losses					Total
As of December 31, 2014	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses
Corporate bonds	$	3,750	$	(9	)	$	—	$	—		$	3,750	$	(9	)
Mortgage-backed and asset-backed securities	275		(2		)	121					396		(2		)
Closed-end bond funds	61		(2		)	4,255		(204		)	4,316		(206		)
	$	4,086	$	(13	)	$	4,376	$	(204	)	$	8,462	$	(217	)

	Less Than 12 Months of Unrealized Losses					12 Months or More of Unrealized Losses					Total
As of March 31, 2014	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses
Corporate bonds	$	992	$	(2	)	$	—	$	—		$	992	$	(2	)
Mortgage-backed and asset-backed securities	431		(16		)	—		—			431		(16		)
Closed-end bond funds	4,819		(333		)	405		(69		)	5,224		(402		)
	$	6,242	$	(351	)	$	405	$	(69	)	$	6,647	$	(420	)

Schedule of Warranty reserve activity

The following table summarizes warranty reserve activity (in thousands):

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2014			2013			2014			2013
Beginning balance	$	175		$	187		$	199		$	220
Additions during the period	41			54			40			28
Settlements and expirations	(75		)	(39		)	(98		)	(46		)
Change in estimates	67			—			67			—
Ending balance	$	208		$	202		$	208		$	202

Schedule of Interest income, net

Interest income, net (in thousands):

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2014		2013		2014		2013
Interest income	$	362	$	519	$	1,091	$	1,389
Net realized gain on short-term investments	123		6		123		3,290
	$	485	$	525	$	1,214	$	4,679

Schedule of Reconciliation of shares used to calculate basic and diluted net loss per share

The reconciliation of shares used to calculate basic and diluted net loss per share consists of the following (in thousands, except per share data):

	Three Months Ended						Nine Months Ended
	December 31,						December 31,
	2014			2013			2014			2013
Net loss	$	(12,131	)	$	(7,284	)	$	(36,913	)	$	(28,810	)
Shares used in net loss per share computation:
Weighted average common shares outstanding, basic	78,920			73,989			78,442			71,986
Net effect of dilutive common share equivalents	—			—			—			—
Weighted average common shares outstanding, diluted	78,920			73,989			78,442			71,986
Basic and diluted net loss per share	$	(0.15	)	$	(0.10	)	$	(0.47	)	$	(0.40	)