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, 2019	$ 15,815	$ (549)	$ 1,742	$ 17,008
Balance at beginning (in shares) at Jun. 30, 2019	4,039,491
Net income			6,112	6,112
Net change in unrealized gain/(loss) from marketable equity investments, net of tax		(1,037)		(1,037)
ESPP shares issued	$ 39			39
ESPP shares issued (in shares)	2,920
Cumulative effect of change in accounting principle			42	42
Share-based compensation	286			286
Share repurchases	$ (3,388)			$ (3,388)
Share repurchases (in shares)	(231,274)
Exercise of stock options (in shares)
Balance at end at Jun. 30, 2020	$ 12,752	(1,586)	7,896	$ 19,062
Balance at end (in shares) at Jun. 30, 2020	3,811,137
Net income			4,450	4,450
Net change in unrealized gain/(loss) from marketable equity investments, net of tax		1,371		1,371
ESPP shares issued	$ 57			57
ESPP shares issued (in shares)	2,677
Share-based compensation	$ 901			901
Share repurchases	$ (5,537)			(5,537)
Share repurchases (in shares)	(216,171)
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	$ (259)			(259)
Shares withheld from common stock issued to pay employee payroll taxes (in shares)	(14,371)
Exercise of stock options	$ 39			$ 39
Exercise of stock options (in shares)	22,388
Balance at end at Jun. 30, 2021	$ 7,953	$ (215)	$ 12,346	$ 20,084
Balance at end (in shares) at Jun. 30, 2021	3,645,660