Certain Financial Statement Information (Tables)

3 Months Ended

Jun. 30, 2016

Certain Financial Statement Information [Abstract]

Schedule of Accounts receivable

Accounts receivable, net:

	June 30, 2016			March 31, 2016
	(In thousands)
Accounts receivable	$	9,426		$	9,527
Less: allowance for bad debts	(263		)	(262		)
	$	9,163		$	9,265

Schedule of Inventories

Inventories:

	June 30, 2016		March 31, 2016
	(In thousands)
Finished goods	$	4,782	$	8,206
Work in process	4,836		5,854
Raw materials	2,986		2,088
	$	12,604	$	16,148

Schedule of Other current assets

Other current assets:

	June 30, 2016		March 31, 2016
	(In thousands)
Prepaid expenses	$	8,988	$	8,887
Executive deferred compensation assets	837		817
Other	1,081		1,071
	$	10,906	$	10,775

Schedule of Property and equipment

Property and equipment:

	Useful Life	June 30, 2016			March 31, 2016
	(In years)	(In thousands)
Machinery and equipment	3-5	$	39,632		$	36,723
Leasehold improvements	1-5	7,528			7,529
Computers, office furniture and equipment	3-5	33,294			34,016
		80,454			78,268
Less: accumulated depreciation		(66,549		)	(64,975		)
		$	13,905		$	13,293

Schedule of Other accrued liabilities

Other accrued liabilities:

	June 30, 2016		March 31, 2016
	(In thousands)
Employee related liabilities	$	1,563	$	1,362
Executive deferred compensation	871		848
Accrued bonus	3,921		3,269
Other	4,961		4,314
	$	11,316	$	9,793

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):

	June 30, 2016									March 31, 2016
	Amortized Cost		Gross Unrealized					Estimated Fair Value		Amortized Cost		Gross Unrealized					Estimated Fair Value
			Gains		Losses							Gains		Losses
Cash	$	21,219	$	—	$	—		$	21,219	$	23,510	$	—	$	—		$	23,510
Cash equivalents	3,006		—		—			3,006		1,555		—		—			1,555
U.S. Treasury and agency securities	14,173		74		—			14,247		14,863		38		(3		)	14,898
Corporate bonds	24,861		338		—			25,199		28,047		221		(5		)	28,263
Asset-backed and mortgage-backed securities	16,701		65		(18		)	16,748		13,565		13		(27		)	13,551
Municipal bonds	1,877		15		—			1,892		2,052		16		—			2,068
	$	81,837	$	492	$	(18	)	$	82,311	$	83,592	$	288	$	(35	)	$	83,845
Reported as:
Cash and cash equivalents								$	24,225								$	25,065
Short-term investments available-for-sale								58,086									58,780
								$	82,311								$	83,845

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):

	June 30, 2016								March 31, 2016
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash	$	21,219	$	—	$	—	$	21,219	$	23,510	$	—	$	—	$	23,510
Cash equivalents	3,006		—		—		3,006		1,555		—		—		1,555
U.S. Treasury and agency securities	14,247		—		—		14,247		14,898		—		—		14,898
Corporate bonds	—		25,199		—		25,199		—		28,263		—		28,263
Asset-backed and mortgage-backed securities	—		16,748		—		16,748		—		13,551		—		13,551
Municipal bonds	—		1,892		—		1,892		—		2,068		—		2,068
	$	38,472	$	43,839	$	—	$	82,311	$	39,963	$	43,882	$	—	$	83,845

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 and agency securities, corporate bonds, asset-backed and mortgage-backed securities and municipal bonds, by contractual maturity:

	June 30, 2016
	Cost		Estimated Fair Value
	(In thousands)
Less than 1 year	$	13,471	$	13,471
Mature in 1 – 2 years	34,118		34,386
Mature in 3 – 5 years	8,823		9,023
Mature after 5 years	1,200		1,206
	$	57,612	$	58,086

Schedule of Gross unrealized losses

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

As of June 30, 2016	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
Asset-backed and mortgage-backed securities	$	4,681	$	(18	)	$	—	$	—	$	4,681	$	(18	)

As of March 31, 2016	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 and agency securities	$	9,396	$	(3	)	$	—	$	—	$	9,396	$	(3	)
Corporate bonds	4,601		(5		)	—		—		4,601		(5		)
Asset-backed and mortgage-backed securities	8,394		(27		)	—		—		8,394		(27		)
	$	22,391	$	(35	)	$	—	$	—	$	22,391	$	(35	)

Schedule of Accumulated other comprehensive loss

Accumulated other comprehensive loss:

	Foreign currency translation adjustments			Unrealized gain (loss) on short-term investments			Total
	(In thousands)
Balance as of March 31, 2016	$	(2,486	)	$	(7,067	)	$	(9,553	)
Other comprehensive gain (loss), net of tax	(145		)	147			2
Balance as of June 30, 2016	$	(2,631	)	$	(6,920	)	$	(9,551	)

Schedule of Interest income, net

Realized gain on short-term investments and interest income, net:

	Three Months Ended June 30,
	2016		2015
	(In thousands)
Net realized gain on short-term investments	$	32	$	1,430
Interest income, net	198		189
	$	230	$	1,619

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:

	June 30, 2016	June 30, 2015
	(In thousands)
Outstanding stock options	1,384	1,713
Outstanding RSUs	5,420	3,997
ESPP shares	383	249
	7,187	5,959