Investments - Additional Information (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2018 USD ($)	Jun. 30, 2018 USD ($) position	Oct. 31, 2017 shares	Jun. 30, 2017 position
Cash, cash equivalents and short-term investments
Proceeds from sale of available-for-sale securities, debt	$ 23,900
Loss on sales of investments		$ 171
Number of positions held in an unrealized loss position | position		0		8
Technology Company | Common Stock
Cash, cash equivalents and short-term investments
Investment owned, shares | shares			143,000
Proceeds from sale of available-for-sale securities, equity		$ 400
Loss on sales of investments		100
Other expense, net
Cash, cash equivalents and short-term investments
Available for sale securities, reclassified from other comprehensive income to other expense, net		$ 77