Short-term Investments (Tables)

3 Months Ended

Dec. 31, 2015

Investments Debt And Equity Securities [Abstract]

Short-term Investments

	AS OF DECEMBER 31, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments:
Corporate bonds.........................	$	15,977	$	—	$	(34	)	$	15,943
Government bonds.......................		3,629		—		(10	)		3,619
Total................................	$	19,606	$	—	$	(44	)	$	19,562

	AS OF SEPTEMBER 30, 2015
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments:
Corporate bonds.........................	$	15,166	$	—	$	(5	)	$	15,161
Government bonds.......................		2,948		3		—			2,951
Total................................	$	18,114	$	3	$	(5	)	$	18,112