Investment Securities (Tables)

9 Months Ended

Dec. 31, 2012

Investment Securities

Schedule of investment securities

The following is a summary of investment securities at December 31, 2012:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
Corporate bonds:
Current	$	6,185	$	5	$	(2	)	$	6,188
Non-current	6,128		2		(5		)	6,125
Auction-rate securities:
Non-current	900		—		(9		)	891
Agency and short-term notes:
Current	—		—		—			—
Non-current	990		1		(1		)	990
Time deposits:
Current	20,190		—		—			20,190
Total available-for-sale securities	$	34,393	$	8	$	(17	)	$	34,384

The following is a summary of investment securities at March 31, 2012:

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
Corporate bonds:
Current	$	5,999	$	8	$	(2	)	$	6,005
Non-current	2,388		3		(3		)	2,388
Auction-rate securities:
Non-current	900		—		(20		)	880
Agency and short-term notes:
Non-current	1,001		—		—			1,001
Time deposits:
Current	17,050		—		—			17,050
Total available-for-sale securities	$	27,338	$	11	$	(25	)	$	27,324