Short-term Investments

3 Months Ended

Dec. 31, 2016

Investments Debt And Equity Securities [Abstract]

Short-term Investments

2.   Short-term Investments

	As of December 31, 2016 (in thousands)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments
Corporate bonds	$	15,653	$	—	$	(45	)	$	15,608
Government bonds		9,167		—		(36	)		9,131
Total	$	24,820	$	—	$	(81	)	$	24,739

	As of September 30, 2016 (in thousands)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments
Corporate bonds	$	17,342	$	—	$	(19	)	$	17,323
Government bonds		10,169		—		(1	)		10,168
Total	$	27,511	$	—	$	(20	)	$	27,491