FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Cash, cash equivalents, and available-for-sale investments (in thousands):

	Amortized		Gross Unrealized		Gross Unrealized			Estimated		Cash and Cash		Short-Term
As of December 31, 2018	Costs		Gain		Loss			Fair Value		Equivalents		Investments
Cash	$	22,005	$	—	$	—		$	22,005	$	22,005	$	—
Level 1:
Money market funds	6,320		—		—			6,320		6,320		—
Subtotal	28,325		—		—			28,325		28,325		—
Level 2:
Corporate debt	59,480		6		(222		)	59,264		—		59,264
Municipal securities	5,504		1		(4		)	5,501		—		5,501
Asset backed securities	17,577		5		(50		)	17,532		—		17,532
Agency bond	4,240		—		(30		)	4,210		—		4,210
Subtotal	86,801		12		(306		)	86,507		—		86,507
Total assets	$	115,126	$	12	$	(306	)	$	114,832	$	28,325	$	86,507

	Amortized		Gross Unrealized		Gross Unrealized			Estimated		Cash and Cash		Short-Term
As of March 31, 2018	Costs		Gain		Loss			Fair Value		Equivalents		Investments
Cash	$	16,499	$	—	$	—		$	16,499	$	16,499	$	—
Level 1:
Money market funds	15,204		—		—			15,204		15,204		—
Subtotal	31,703		—		—			31,703		31,703		—
Level 2:
Commercial paper	13,254		—		(8		)	13,246		—		13,246
Corporate debt	70,631		6		(296		)	70,341		—		70,341
Municipal securities	3,385		3		(1		)	3,387		—		3,387
Asset backed securities	27,063		1		(119		)	26,945		—		26,945
Agency bond	4,183		—		(35		)	4,148		—		4,148
International government securities	2,497		—		(5		)	2,492		—		2,492
Subtotal	121,013		10		(464		)	120,559		—		120,559
Total assets	$	152,716	$	10	$	(464	)	$	152,262	$	31,703	$	120,559

Contractual Maturity of Investments

Contractual maturities of investments as of December 31, 2018 are set forth below (in thousands):

	Estimated
	Fair Value
Due within one year	$	35,929
Due after one year	50,578
Total	$	86,507