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]	Non-Controlling Interest [Member]	Total
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
Share-based compensation expense		231				231
Repurchase and retirement of common stock	$ (4)	(1,433)				(1,437)
Repurchase and retirement of common stock (in shares)	(378,421)
Lapse of restrictions on restricted stock	$ 0	0
Lapse of restrictions on restricted stock (in shares)	17,500
Acquisition of non-controlling interest					$ 893	893
Other comprehensive loss, net of taxes:
Net income (loss)			681		(131)	550
Unrealized gain (loss) on available-for-sale investments				(3,677)		(3,677)
Adoption of ASU 2016-01				(318)		(318)
Foreign currency translation adjustment				64		64
Pension plan				(335)		(335)
Total comprehensive income (loss)						(3,716)
Balance at Jun. 30, 2019	$ 87	208,881	(150,795)	(6,579)	762	52,356
Balance (in shares) at Jun. 30, 2019	8,756,156
Share-based compensation expense		411				411
Repurchase and retirement of common stock		(68)				(68)
Repurchase and retirement of common stock (in shares)	(16,821)
Lapse of restrictions on restricted stock	$ 1	(1)
Lapse of restrictions on restricted stock (in shares)	58,336
Distributions to non-controlling interest					(300)	(300)
Dividends			(4,512)			(4,512)
Other comprehensive loss, net of taxes:
Net income (loss)			12,230		799	13,029
Unrealized gain (loss) on available-for-sale investments				156		156
Foreign currency translation adjustment				27		27
Pension plan				190		190
Total comprehensive income (loss)						13,402
Balance at Jun. 30, 2020	$ 88	$ 209,223	$ (143,077)	$ (6,206)	$ 1,261	$ 61,289
Balance (in shares) at Jun. 30, 2020	8,797,671