Fair Value of Financial Assets and Liabilities (Tables)

12 Months Ended

Apr. 30, 2015

Fair Value Disclosures [Abstract]

Summary of Cash and Cash Equivalents

The following table summarizes the Company’s cash and cash equivalents as of April 30, 2015 and 2014 (in thousands):

	April 30,
	2015		2014
Demand deposit accounts	$	49,977	$	24,721
Money market funds		2,831		6,971
Certificates of deposit		—		242
Municipal bonds		102		—
Commercial paper		875		—
Corporate bonds		256		—
Total cash and cash equivalents	$	54,041	$	31,934

Summary of Short-Term Investments

The following table summarizes the Company’s short-term investments as of April 30, 2015 (in thousands):

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
Certificates of deposit	$	4,000	$	4	$	—		$	4,004
Municipal bonds		4,564		17		(16	)		4,565
Commercial paper		6,269		4		—			6,273
U.S. Treasury notes		23,820		1		(12	)		23,809
U.S. Treasury bonds		5,001		—		(2	)		4,999
Corporate notes		2,709		1		(2	)		2,708
Corporate bonds		6,395		3		(26	)		6,372
Total short-term investments	$	52,758	$	30	$	(58	)	$	52,730

The following table summarizes the Company’s short-term investments as of April 30, 2014 (in thousands):

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Available-for-sale securities:
Certificates of deposit	$	7,466	$	17	$	(9	)	$	7,474
U.S. Treasury notes		33,226		2		(2	)		33,226
Total short-term investments	$	40,692	$	19	$	(11	)	$	40,700

Summary of Fair Value of Financial Assets and Liabilities

The following table summarizes the fair value of the Company’s financial assets and liabilities that were measured on a recurring basis as of April 30, 2015 and 2014 (in thousands):

	Fair Value Measurements at April 30,
	2015								2014
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	2,831	$	—	$	—	$	2,831	$	6,971	$	—	$	—	$	6,971
Certificates of deposit		—		—		—		—		242		—		—		242
Municipal bonds		—		102		—		102		—		—		—		—
Commercial paper		—		875		—		875		—		—		—		—
Corporate bonds		—		256		—		256		—		—		—		—
Total cash equivalents		2,831		1,233		—		4,064		7,213		—		—		7,213
Restricted cash		—		—		—		—		604		—		—		604
Short-term investments:
Certificates of deposit		—		4,004		—		4,004		—		7,474		—		7,474
Municipal bonds		—		4,565		—		4,565		—		—		—		—
Commercial paper		—		6,273		—		6,273		—		—		—		—
U.S. Treasury notes		23,809		—		—		23,809		33,226		—		—		33,226
U.S. Treasury bonds		4,999		—		—		4,999		—		—		—		—
Corporate notes		—		2,708		—		2,708		—		—		—		—
Corporate bonds		—		6,372		—		6,372		—		—		—		—
Total short-term investments		28,808		23,922		—		52,730		33,226		7,474		—		40,700
Total assets	$	31,639	$	25,155	$	—	$	56,794	$	41,043	$	7,474	$	—	$	48,517