Certain Financial Statement Information (Tables)

9 Months Ended

Dec. 31, 2015

Certain Financial Statement Information [Abstract]

Schedule of Accounts receivable

Accounts receivable, net:

	December 31, 2015			March 31, 2015
	(In thousands)
Accounts receivable	$	12,732		$	12,709
Less: allowance for bad debts	(280		)	(302		)
	$	12,452		$	12,407

Schedule of Inventories

Inventories:

	December 31, 2015		March 31, 2015
	(In thousands)
Finished goods	$	10,405	$	15,310
Work in process	6,508		5,377
Raw materials	2,779		2,827
	$	19,692	$	23,514

Schedule of Other current assets

Other current assets:

	December 31, 2015		March 31, 2015
	(In thousands)
Prepaid expenses	$	12,284	$	14,847
Executive deferred compensation assets	985		1,004
Other	1,309		989
	$	14,578	$	16,840

Schedule of Property and equipment

Property and equipment:

	Useful Life	December 31, 2015			March 31, 2015
	(In years)	(In thousands)
Machinery and equipment	3-5	$	38,244		$	37,286
Leasehold improvements	1-5	7,528			9,909
Computers, office furniture and equipment	3-5	34,444			32,902
		80,216			80,097
Less: accumulated depreciation		(66,868		)	(63,348		)
		$	13,348		$	16,749

Schedule of Other accrued liabilities

Other accrued liabilities:

	December 31, 2015		March 31, 2015
	(In thousands)
Employee related liabilities	$	1,377	$	1,454
Executive deferred compensation	1,017		1,025
Accrued bonus	1,768		39
Income taxes	330		1,311
Other	4,491		3,815
	$	8,983	$	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):

	December 31, 2015									March 31, 2015
	Amortized Cost		Gross Unrealized					Estimated Fair Value		Amortized Cost		Gross Unrealized					Estimated Fair Value
			Gains		Losses							Gains		Losses
Cash	$	16,299	$	—	$	—		$	16,299	$	33,936	$	—	$	—		$	33,936
Cash equivalents	2,471		—		—			2,471		2,559		—		—			2,559
U.S. Treasury securities and agency bonds	17,855		—		(54		)	17,801		1,230		—		—			1,230
Corporate bonds	25,957		18		(63		)	25,912		10,772		28		(6		)	10,794
Asset-backed and mortgage-backed securities	11,948		1		(50		)	11,899		—		15		—			15
Municipal bonds	2,071		—		(10		)	2,061		—		—		—			—
Mutual funds	—		—		—			—		24,895		1,955		(59		)	26,791
Preferred stock	—		—		—			—		11		22		—			33
	$	76,601	$	19	$	(177	)	$	76,443	$	73,403	$	2,020	$	(65	)	$	75,358
Reported as:
Cash and cash equivalents								$	18,770								$	36,495
Short-term investments available-for-sale								57,673									38,863
								$	76,443								$	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):

	December 31, 2015								March 31, 2015
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash	$	16,299	$	—	$	—	$	16,299	$	33,936	$	—	$	—	$	33,936
Cash equivalents	2,071		400		—		2,471		2,559		—		—		2,559
U.S. Treasury securities and agency bonds	17,801		—		—		17,801		1,230		—		—		1,230
Corporate bonds	—		25,912		—		25,912		—		10,794		—		10,794
Asset-backed and mortgage-backed securities	—		11,899		—		11,899		—		15		—		15
Municipal bonds	—		2,061		—		2,061		—		—		—		—
Mutual funds	—		—		—		—		26,791		—		—		26,791
Preferred stock	—		—		—		—		—		33		—		33
	$	36,171	$	40,272	$	—	$	76,443	$	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 and mortgage-backed securities and municipal bonds, by contractual maturity (in thousands):

	December 31, 2015
	Cost		Estimated Fair Value
Less than 1 year	$	15,500	$	15,485
Mature in 1 – 2 years	31,021		30,908
Mature in 3 – 5 years	11,310		11,280
Mature after 5 years	—		—
	$	57,831	$	57,673

Schedule of Gross unrealized losses

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

As of December 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
U.S. Treasury securities and agency bonds	$	17,260	$	(54	)	$	—	$	—	$	17,260	$	(54	)
Corporate bonds	18,243		(63		)	—		—		18,243		(63		)
Asset-backed and mortgage-backed securities	10,793		(50		)	—		—		10,793		(50		)
Municipal bonds	1,898		(10		)	—		—		1,898		(10		)
	$	48,194	$	(177	)	$	—	$	—	$	48,194	$	(177	)

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 Interest income, net

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

	Three Months Ended December 31,					Nine Months Ended December 31,
	2015			2014		2015		2014
Net realized gain (loss) on short-term investments	$	(2	)	$	123	$	1,557	$	123
Interest income, net	150			362		467		1,091
	$	148		$	485	$	2,024	$	1,214

Schedule of potentially dilutive common shares excluded from EPS computation

The following potentially dilutive common shares are excluded from the computation of net loss per share (in thousands):

	December 31, 2015	December 31, 2014
Outstanding stock options	1,650	1,882
Outstanding RSUs	4,752	4,642
ESPP shares	365	350
	6,767	6,874