CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	COMMON SHARES [Member]	Accumulated other comprehensive income (loss): [Member]	Retained earnings/(accumulated deficit): [Member]	Total
Balance at beginning at Jun. 30, 2018	$ 19,835	$ (153)	$ (2,406)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	10
Share repurchases	(1,115)
Shares withheld from common stock issued to employees to pay employee payroll taxes	(101)
ESPP shares issued	10
Cumulative effect of change in accounting principle
Net income			1,349	$ 1,349
Net change in unrealized gain (loss) from marketable securities, net of taxes		298
Balance at end at Sep. 30, 2018	18,639	145	(1,057)	17,727
Balance at beginning at Jun. 30, 2019	15,815	(549)	1,742	17,008
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation expense	12
Share repurchases	(681)
Shares withheld from common stock issued to employees to pay employee payroll taxes
ESPP shares issued	15
Cumulative effect of change in accounting principle			43
Net income			1,104	1,104
Net change in unrealized gain (loss) from marketable securities, net of taxes		(57)
Balance at end at Sep. 30, 2019	$ 15,161	$ (606)	$ 2,889	$ 17,444