Investments (Tables)

6 Months Ended

Mar. 31, 2016

Summary of Investments by Type of Security

The following table summarizes investments by type of security as of March 31, 2016:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Available-for-sale securities:
Corporate debt securities, short-term	$	10,479	$	2	$	(1	)	$	10,480
Corporate debt securities, long-term		753		-		(3	)		750
Government debt securities, short-term		4,458		-		(3	)		4,455
Government debt securities, long-term		3,003		1		(1	)		3,003
Total	$	18,693	$	3	$	(8	)	$	18,688

The following table summarizes investments by type of security as of September 30, 2015:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Available-for-sale securities:
Corporate debt securities, short-term	$	23,924	$	3	$	(6	)	$	23,921
Corporate debt securities, long-term		—		—		—			—
Total	$	23,924	$	3	$	(6	)	$	23,921

Summary of Fair Value of Investments Measured on Recurring Basis

The following table represents the fair value hierarchy of the Company’s investments and acquisition related contingent consideration:

	Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
March 31, 2016:
Assets:
Short-term investments:
Corporate debt securities
Industrial	$	5,478	$	-
Financial		2,805		-
Commercial paper
Financial		1,497		-
Industrial		700		-
Government debt securities
U.S. Treasury		4,455		-
Long-term investments:
Corporate debt securities
Industrial		750		-
Government debt securities
U.S. Treasury		3,003		-
Total assets at fair value	$	18,688	$	-
Liabilities:
Acquisition-related contingent consideration		-		221
Total liabilities at fair value	$	-	$	221

	Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
September 30, 2015:
Assets:
Short-term investments:
Corporate debt securities
Financial	$	10,308	$	-
Industrial		9,665		-
Utility		1,802		-
Commercial paper
Industrial		1,448		-
Financial		698		-
Total assets at fair value	$	23,921	$	-
Liabilities:
Acquisition-related contingent consideration		-		47
Total liabilities at fair value	$	-	$	47

Contingent Consideration

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 six months ended March 31, 2016:

Balance at September 30, 2015	$	47
Expenses recorded due to changes in fair value		174
Payments		-
Balance at March 31, 2016	$	221