Investments (Tables)

12 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments by Type of Security

The following tables summarize investments by type of security as of September 30, 2020 and 2019, respectively (amounts shown in thousands):

September 30, 2020:	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
Available-for-sale securities:
U.S. Treasury, short-term	$	10,245	$	38	$	—	$	10,283
Asset-backed securities, short-term	4,723		36		—		4,759
Corporate debt securities, short-term	24,956		37		—		24,993
Corporate debt securities, long-term	1,966		—		(3)		1,963
Total	$	41,890	$	111	$	(3)	$	41,998

September 30, 2019:	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
Available-for-sale securities:
U.S. Treasury, short-term	$	4,240	$	2	$	—	$	4,242
Corporate debt securities, short-term	12,258		2		—		12,260
U.S. Treasury, long-term	1,102		—		(1)		1,101
Corporate debt securities, long-term	451		—		—		451
Total	$	18,051	$	4	$	(1)	$	18,054

Schedule 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 September 30, 2020 and 2019, respectively (amounts shown in thousands):

September 30, 2020:	Balance		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Short-term investments:
U.S. Treasury	$	10,283	$	10,283	$	—	$	—
Asset-backed securities	4,759		—		4,759		—
Corporate debt securities
Financial	7,695		—		7,695		—
Industrial	1,924		—		1,924		—
Commercial paper
Financial	13,479		—		13,479		—
Industrial	1,895		—		1,895		—
Total short-term investments at fair value	40,035		10,283		29,752		—
Long-term investments:
U.S. Treasury	—		—		—		—
Asset-backed securities	—		—		—		—
Corporate debt securities
Financial	977		—		977		—
Industrial	986		—		986		—
Total assets at fair value	$	41,998	$	10,283	$	31,715	$	—
Liabilities:
Acquisition-related contingent consideration	753		—		—		753
Total liabilities at fair value	$	753	$	—	$	—	$	753

September 30, 2019:	Balance		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Short-term investments:
U.S. Treasury	$	4,242	$	4,242	$	—	$	—
Corporate debt securities
Financial	2,503		—		2,503		—
Industrial	1,371		—		1,371		—
Commercial paper
Financial	5,560		—		5,560		—
Industrial	2,826		—		2,826		—
Total short-term investments at fair value	16,502		4,242		12,260		—
Long-term investments:
U.S. Treasury	1,101		1,101		—		—
Corporate debt securities
Financial	451		—		451		—
Industrial	—		—		—		—
Total assets at fair value	$	18,054	$	5,343	$	12,711	$	—
Liabilities:
Acquisition-related contingent consideration	1,601		—		—		1,601
Total liabilities at fair value	$	1,601	$	—	$	—	$	1,601

Schedule of Acquisition-related 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 year ended September 30, 2020 (amounts shown in thousands):

Balance at September 30, 2019	$	1,601
Expenses recorded due to changes in fair value	136
Payment of contingent consideration	(1,049)
Foreign currency effect on contingent consideration	65
Balance at September 30, 2020	$	753