Investments (Tables)

12 Months Ended

Jun. 30, 2018

Investments Debt And Equity Securities [Abstract]

Schedule of available-for-sale debt securities that were in a continuous unrealized loss position

The following table summarizes the available-for-sale debt securities that were in a continuous unrealized loss position, but were not deemed to be other-than-temporarily impaired (in thousands):

	Less Than 12 Months					12 Months or Greater					Total
	Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value		Gross Unrealized Losses			Estimated Fair Value
June 30, 2018
Debt Securities:
U. S. government agency securities	$	—		$	—	$	—		$	—	$	—		$	—
Total	$	—		$	—	$	—		$	—	$	—		$	—
June 30, 2017
Debt Securities:
U. S. government agency securities	$	(31	)	$	11,970	$	(58	)	$	11,939	$	(89	)	$	23,909
Total	$	(31	)	$	11,970	$	(58	)	$	11,939	$	(89	)	$	23,909