CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common stock [Member]	Capital In Excess Of Par Value [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Treasury Stock [Member]	Total
Balance at Jun. 30, 2017	$ 94	$ 212,018	$ (165,498)	$ (2,890)		$ (255)	$ 43,469
Balance (in shares) at Jun. 30, 2017	9,410,878					(37,788)
Dividends declared			(2,378)				(2,378)
Dividends forfeited with restricted stock forfeitures			8				8
Share-based compensation expense		2,313					2,313
Lapse of restriction on restricted stock	$ 5	(5)					0
Lapse of restriction on restricted stock (in shares)	526,013
Repurchase and retirement of treasury shares	$ (8)	(4,243)	(12)			$ 255	(4,008)
Repurchase and retirement of treasury shares (in shares)	(819,814)					37,788
Other comprehensive loss, net of taxes:
Net income			16,085				16,085
Unrealized loss on available-for-sale investments				(1,373)			(1,373)
Foreign currency translation adjustment				1,977			1,977
Pension plan				(27)			(27)
Total comprehensive income							16,662
Balance at Jun. 30, 2018	$ 91	210,083	(151,795)	(2,313)			56,066
Balance (in shares) at Jun. 30, 2018	9,117,077
Dividends forfeited with restricted stock forfeitures			1				1
Adoption of ASU 2016-01			318				318
Acquisition of non-controlling interest					$ 893		893
Share-based compensation expense		231					231
Lapse of restriction on restricted stock							0
Lapse of restriction on restricted stock (in shares)	17,500
Repurchase and retirement of treasury shares	$ (4)	(1,433)					(1,437)
Repurchase and retirement of treasury shares (in shares)	(378,421)
Other comprehensive loss, net of taxes:
Net income			681		(131)		550
Unrealized loss on available-for-sale investments				(3,677)			(3,677)
Foreign currency translation adjustment				64			64
Pension plan				(335)			(335)
Adoption of ASU 2016-01				(318)			(318)
Total comprehensive income							(3,716)
Balance at Jun. 30, 2019	$ 87	$ 208,881	$ (150,795)	$ (6,579)	$ 762	$ 0	$ 52,356
Balance (in shares) at Jun. 30, 2019	8,756,156					0