Certain Financial Statement Information (Tables)

6 Months Ended

Sep. 30, 2015

Certain Financial Statement Information [Abstract]

Schedule of Accounts receivable

Accounts receivable, net:

	September 30, 2015			March 31, 2015
	(In thousands)
Accounts receivable	$	12,909		$	12,709
Less: allowance for bad debts	(285		)	(302		)
	$	12,624		$	12,407

Schedule of Inventories

Inventories:

	September 30, 2015		March 31, 2015
	(In thousands)
Finished goods	$	10,807	$	15,310
Work in process	6,090		5,377
Raw materials	3,485		2,827
	$	20,382	$	23,514

Schedule of Other current assets

Other current assets:

	September 30, 2015		March 31, 2015
	(In thousands)
Prepaid expenses	$	13,335	$	14,847
Executive deferred compensation assets	942		1,004
Other	1,268		989
	$	15,545	$	16,840

Schedule of Property and equipment

Property and equipment:

	Useful Life	September 30, 2015			March 31, 2015
	(In years)	(In thousands)
Machinery and equipment	3-5	$	37,795		$	37,286
Leasehold improvements	1-5	7,533			9,909
Computers, office furniture and equipment	3-5	33,904			32,902
		79,232			80,097
Less: accumulated depreciation		(64,817		)	(63,348		)
		$	14,415		$	16,749

Schedule of Goodwill

Goodwill:

	September 30, 2015		March 31, 2015
	(In thousands)
Goodwill	$	11,425	$	11,425

Schedule of Other assets

Other assets:

	September 30, 2015		March 31, 2015
	(In thousands)
Non-current portion of prepaid expenses	$	854	$	1,974
Other	595		596
	$	1,449	$	2,570

Schedule of Other accrued liabilities

Other accrued liabilities:

	September 30, 2015		March 31, 2015
	(In thousands)
Employee related liabilities	$	1,415	$	1,454
Executive deferred compensation	984		1,025
Income taxes	304		1,311
Other	5,614		3,854
	$	8,317	$	7,644

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):

	September 30, 2015									March 31, 2015
	Amortized Cost		Gross Unrealized					Estimated Fair Value		Amortized Cost		Gross Unrealized					Estimated Fair Value
			Gains		Losses							Gains		Losses
Cash	$	16,224	$	—	$	—		$	16,224	$	33,936	$	—	$	—		$	33,936
Cash equivalents	4,851		—		—			4,851		2,559		—		—			2,559
U.S. Treasury securities and agency bonds	23,813		40		—			23,853		1,230		—		—			1,230
Corporate bonds	24,515		69		(17		)	24,567		10,772		28		(6		)	10,794
Asset-backed securities	4,633		2		(1		)	4,634		—		15		—			15
Municipal bonds	1,353		2		—			1,355		—		—		—			—
Mutual funds	—		—		—			—		24,895		1,955		(59		)	26,791
Preferred stock	5		11		—			16		11		22		—			33
	$	75,394	$	124	$	(18	)	$	75,500	$	73,403	$	2,020	$	(65	)	$	75,358
Reported as:
Cash and cash equivalents								$	21,075								$	36,495
Short-term investments available-for-sale								54,425									38,863
								$	75,500								$	75,358

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):

	September 30, 2015								March 31, 2015
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash	$	16,224	$	—	$	—	$	16,224	$	33,936	$	—	$	—	$	33,936
Cash equivalents	4,851		—		—		4,851		2,559		—		—		2,559
U.S. Treasury securities and agency bonds	23,853		—		—		23,853		1,230		—		—		1,230
Corporate bonds	—		24,567		—		24,567		—		10,794		—		10,794
Asset-backed securities	—		4,634		—		4,634		—		15		—		15
Municipal bonds	1,355		—		—		1,355		—		—		—		—
Mutual funds	—		—		—		—		26,791		—		—		26,791
Preferred stock	—		16		—		16		—		33		—		33
	$	46,283	$	29,217	$	—	$	75,500	$	64,516	$	10,842	$	—	$	75,358

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, asset-backed securities and municipal bonds, by contractual maturity (in thousands):

	September 30, 2015
	Cost		Estimated Fair Value
Less than 1 year	$	11,574	$	11,583
Mature in 1 – 2 years	31,700		31,730
Mature in 3 – 5 years	11,040		11,096
Mature after 5 years	—		—
	$	54,314	$	54,409

Schedule of Gross unrealized losses

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

As of September 30, 2015	Less Than 12 Months of Unrealized Losses					12 Months or More of Unrealized Losses				Total
	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses		Estimated Fair Value		Gross Unrealized Losses
U.S. Treasury securities and agency bonds	$	1,579	$	—		$	—	$	—	$	1,579	$	—
Corporate bonds	6,617		(17		)	—		—		6,617		(17		)
Asset-backed securities	1,404		(1		)	—		—		1,404		(1		)
	$	9,600	$	(18	)	$	—	$	—	$	9,600	$	(18	)

As of March 31, 2015	Less Than 12 Months of Unrealized Losses					12 Months or More of Unrealized Losses					Total
	Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses
Corporate bonds	$	878	$	(6	)	$	—	$	—		$	878	$	(6	)
Mutual funds	14,592		(17		)	475		(42		)	15,067		(59		)
	$	15,470	$	(23	)	$	475	$	(42	)	$	15,945	$	(65	)

Schedule of Warranty reserve activity

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

	Three Months Ended September 30,						Six Months Ended September 30,
	2015			2014			2015			2014
Beginning balance	$	222		$	177		$	194		$	199
Additions during the period	72			6			129			—
Settlements and expirations	(25		)	(8		)	(53		)	(23		)
Change in estimates	(9		)	—			(10		)	(1		)
Ending balance	$	260		$	175		$	260		$	175

Schedule of Interest income, net

Realized gain on short-term investments and interest income, net (in thousands):

	Three Months Ended September 30,				Six Months Ended September 30,
	2015		2014		2015		2014
Net realized gain on short-term investments	$	127	$	5	$	1,557	$	—
Interest income, net	130		388		319		729
	$	257	$	393	$	1,876	$	729

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 September 30,						Six Months Ended September 30,
	2015			2014			2015			2014
Net loss	$	(8,061	)	$	(11,717	)	$	(15,465	)	$	(24,782	)
Shares used in net loss per share computation:
Weighted average common shares outstanding, basic	82,176			78,487			81,680			78,202
Net effect of dilutive common share equivalents	—			—			—			—
Weighted average common shares outstanding, diluted	82,176			78,487			81,680			78,202
Basic and diluted net loss per share	$	(0.10	)	$	(0.15	)	$	(0.19	)	$	(0.32	)