Investments (Tables)

3 Months Ended

Dec. 31, 2016

Summary of Investments by Type of Security

The following table summarizes investments by type of security as of December 31, 2016 (amounts shown in thousands):

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Available-for-sale securities:
U.S. Treasury	$	12,904	$	1	$	(2	)	$	12,903
Corporate debt securities, short-term		15,427		—		(16	)		15,411
Total	$	28,331	$	1	$	(18	)	$	28,314

The following table summarizes investments by type of security as of September 30, 2016 (amounts shown in thousands):

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Available-for-sale securities:
U.S. Treasury	$	12,907	$	8	$	—		$	12,915
Corporate debt securities, short-term		11,949		2		(3	)		11,948
Corporate debt securities, long-term		1,954		1		(3	)		1,952
Total	$	26,810	$	11	$	(6	)	$	26,815

Summary of Fair Value of Investments Measured on Recurring Basis

The following tables represent the fair value hierarchy of the Company’s investments and acquisition-related contingent consideration as of December 31, 2016 and September 30, 2016, respectively (amounts shown in thousands):

	Balance		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
December 31, 2016:
Assets:
Short-term investments:
U.S. Treasury	$	12,903	$	12,903	$	—	$	—
Corporate debt securities
Financial		3,450		—		3,450		—
Industrial		5,176		—		5,176		—
Commercial paper
Financial		4,089		—		4,089		—
Industrial		2,696		—		2,696		—
Total short-term investments at fair value	$	28,314	$	12,903	$	15,411	$	—
Liabilities:
Acquisition-related contingent consideration		282		—		—		282
Total liabilities at fair value	$	282	$	—	$	—	$	282

	Balance		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2016:
Assets:
Short-term investments:
U.S. Treasury	$	12,915	$	12,915	$	—	$	—
Corporate debt securities
Financial		3,963		—		3,963		—
Industrial		4,445		—		4,445		—
Commercial paper
Financial		2,843		—		2,843		—
Industrial		697		—		697		—
Total short-term investments at fair value		24,863		12,915		11,948		—
Long-term investments:
Corporate debt securities
Financial		502		—		502		—
Industrial		1,450		—		1,450		—
Total assets at fair value	$	26,815	$	12,915	$	13,900	$	—
Liabilities:
Acquisition-related contingent consideration		252		—		—		252
Total liabilities at fair value	$	252	$	—	$	—	$	252

Contingent Consideration [Member]

Summary of Contingent Consideration Measured at Fair Value

The following table includes a summary of the contingent consideration measured at fair value using significant unobservable inputs (Level 3) during the three months ended December 31, 2016 (amounts shown in thousands):

Balance at September 30, 2016	$	252
Expenses recorded due to changes in fair value		73
Issuance of common stock		(43	)
Balance at December 31, 2016	$	282