6. FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Mar. 31, 2017

FINANCIAL INSTRUMENTS

Schedule of fair value of financial assets measured on a recurring basis

The fair value of financial assets measured on a recurring basis is as follows (in thousands):

			Fair Value Measurements at Reporting Date Using
			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
			Identical Assets		Observable		Unobservable
			and Liabilities		Inputs		Inputs
	March 31, 2017		(Level 1)		(Level 2)		(Level 3)
Assets:
Money market funds	$	6,293	$	6,293	$	—	$	—
Marketable securities		29,097		—		29,097		—
Total	$	35,390	$	6,293	$	29,097	$	—

			Fair Value Measurements at Reporting Date Using
			Quoted Prices
			in Active		Significant
			Markets for		Other		Significant
			Identical Assets		Observable		Unobservable
			and Liabilities		Inputs		Inputs
	March 31, 2016		(Level 1)		(Level 2)		(Level 3)
Assets:
Money market funds	$	6,611	$	6,611	$	—	$	—
Marketable securities		34,297		—		34,297		—
Total	$	40,908	$	6,611	$	34,297	$	—

Schedule of available-for-sale investments

	March 31, 2017
			Gross		Gross
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(In thousands)
Short-term investments:
Corporate notes	$	557	$	—	$	(2)	$	555
Certificates of deposit		10,000		9		(3)		10,006
Foreign government obligations		1,001		—		(1)		1,000
State and municipal obligations		1,632		1		—		1,633
Agency bonds		3,012		—		(7)		3,005
Total short-term investments	$	16,202	$	10	$	(13)	$	16,199
Long-term investments:
Certificates of deposit	$	7,500	$	3	$	(39)	$	7,464
Foreign government obligations		5,442		—		(8)		5,434
Total long-term investments	$	12,942	$	3	$	(47)	$	12,898

	March 31, 2016
			Gross		Gross
			Unrealized		Unrealized		Fair
	Cost		Gains		Losses		Value
	(In thousands)
Short-term investments:
State and municipal obligations	$	1,011	$	—	$	—	$	1,011
Corporate notes		5,680		—		(4)		5,676
Agency bonds		2,001		1		—		2,002
Foreign government obligations		2,695		3		—		2,698
Certificates of deposit		11,750		12		—		11,762
Total short-term investments	$	23,137	$	16	$	(4)	$	23,149
Long-term investments:
Corporate notes	$	558	$	1	$	—	$	559
Certificates of deposit		8,500		24		(1)		8,523
Agency bonds		1,000		4		—		1,004
Foreign government obligations		1,060		1		—		1,061
Total long-term investments	$	11,118	$	30	$	(1)	$	11,147

Schedule of contractual maturities of the available-for-sale investments

			Fair
	Cost		Value
	(In thousands)
Maturing within one year	$	16,202	$	16,199
Maturing in one to three years		12,942		12,898
	$	29,144	$	29,097