STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Common Shares [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings/(Accumulated Deficit) [Member]	Total
Balance at beginning at Jun. 30, 2017		$ 17,704	$ 33	$ (4,027)	$ 13,710
Balance at beginning (in shares) at Jun. 30, 2017		4,025,193
Net income				1,621	$ 1,621
Exercise of stock options (in shares)
Net change in unrealized gain (loss) from marketable equity investments			(186)		$ (186)
ESPP shares issued		$ 37			37
ESPP shares issued (in shares)		6,733
Share-based compensation		$ 194			194
Shares issued under ATM	[1]	$ 2,120			2,120
Shares issued under ATM, (in shares)	[1]	332,189
Share repurchases		$ (220)			(220)
Share repurchases (in shares)		(33,026)
Balance at end at Jun. 30, 2018		$ 19,835	(153)	(2,406)	17,276
Balance at end (in shares) at Jun. 30, 2018		4,331,089
Net income				4,148	4,148
Exercise of stock options		$ 6			$ 6
Exercise of stock options (in shares)		3,000			3,000
Net change in unrealized gain (loss) from marketable equity investments			(396)		$ (396)
ESPP shares issued		$ 22			22
ESPP shares issued (in shares)		2,743
Shares issued in connection with performance award vesting
Shares issued in connection with performance award vesting (in shares)		40,000
Shares withheld from common stock issued to pay employee payroll taxes		$ (101)			(101)
Shares withheld from common stock issued to pay employee payroll taxes (in shares)		(15,273)
Share-based compensation		$ 37			37
Share repurchases		$ (3,984)			(3,984)
Share repurchases (in shares)		(322,068)
Balance at end at Jun. 30, 2019		$ 15,815	$ (549)	$ 1,742	$ 17,008
Balance at end (in shares) at Jun. 30, 2019		4,039,491

[1] $142,000 of the proceeds raised from the ATM shares issued during fiscal 2018, were accounted for as a reduction of prepaid expenses related to establishing the ATM.