NOTE 4.

INVESTMENTS

Our investments are classified as either available-for-sale or held-to-maturity. The following table summarizes available-for-sale and held-to-maturity investments as of March 31, 2016 and 2015 (in thousands):

	Available-for-Sale Investments
March 31, 2016	Amortized Cost		Gross Unrealized Gain		Gross Unrealized (Loss)			Fair Value
Corporate bonds	$	7,037	$	-	$	(12	)	$	7,025
Total available-for-sale investments	$	7,037	$	-	$	(12	)	$	7,025

	Held-to-Maturity Investments
March 31, 2016	Amortized Cost		Gross Unrecognized Gain		Gross Unrecognized (Loss)			Fair Value
Certificates of deposit	$	2,737	$	3	$	-		$	2,740
Commercial paper		12,455		-		(6	)		12,449
Corporate bonds		41,715		-		(117	)		41,598
Total held-to-maturity investments	$	56,907	$	3	$	(123	)	$	56,787

	Available-for-Sale Investments
March 31, 2015	Amortized Cost		Gross Unrealized Gain		Gross Unrealized (Loss)			Fair Value
Corporate bonds	$	4,346	$	-	$	(14	)	$	4,332
Total available-for-sale investments	$	4,346	$	-	$	(14	)	$	4,332

	Held-to-Maturity Investments
March 31, 2015	Amortized Cost			Gross Unrecognized Gain			Gross Unrecognized (Loss)				Fair Value
Certificates of deposit		$	6,717		$	4		$	(1	)		$	6,720
Commercial paper			13,484			1			-				13,485
Corporate bonds			22,773			21			(71	)			22,723
Municipal bonds			2,984			21			(1	)			3,004
Total held-to-maturity investments		$	45,958		$	47		$	(73	)		$	45,932

The amortized cost of our held-to-maturity investments approximates their fair value. As of March 31, 2016 and 2015, we did not have other-than-temporary impairment in the fair value of any individual security classified as held-to-maturity or available-for-sale. As of March 31, 2016 and 2015, we had unrealized losses on available-for-sale investments, net of related income taxes of $7,000 and $8,000, respectively. Redemptions of investments in accordance with the callable provisions during fiscal 2016, 2015 and 2014 were $0, $1.3 million and $0.6 million, respectively.

The following table summarizes the amortized cost and fair value of our investments, classified by stated maturity as of March 31, 2016 and 2015 (in thousands):

	March 31, 2016				March 31, 2016
	Available-for-Sale Investments				Held-to-Maturity Investments
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than one year	$	4,314	$	4,311	$	37,163	$	37,128
Due in 1 to 4 years		2,723		2,714		19,744		19,659
Total investments	$	7,037	$	7,025	$	56,907	$	56,787

	March 31, 2015				March 31, 2015
	Available-for-Sale Investments				Held-to-Maturity Investments
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than one year	$	-	$	-	$	26,109	$	26,151
Due in 1 to 4 years		4,346		4,332		19,849		19,781
Total investments	$	4,346	$	4,332	$	45,958	$	45,932