CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class C [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance at Jun. 30, 2018	$ 347	$ 52	$ 15,650	$ (1,878)	$ 1,858	$ 9,513	$ 518	$ 26,060
Reclassification pursuant to adoption of ASU 2016-01, net of tax of $1,049					(2,089)	2,089		0
Balance at Jul. 01, 2018	347	52	15,650	(1,878)	(231)	11,602	518	26,060
Balance at Jun. 30, 2018	347	52	15,650	(1,878)	1,858	9,513	518	26,060
Purchases of shares of Common Stock (class A)				(24)				(24)
Issuance of stock under ESPP shares of Common Stock (class A)			(2)	5				3
Dividends declared						(341)		(341)
Stock bonuses			(3)	6				3
Stock-based compensation expense			2					2
Other comprehensive income (loss), net of tax					1		(8)	(7)
Net income (loss)						(3,581)	52	(3,529)
Balance at Mar. 31, 2019	347	52	15,647	(1,891)	(230)	7,680	562	22,167
Balance at Dec. 31, 2018	347	52	15,649	(1,885)	(258)	7,015	610	21,530
Purchases of shares of Common Stock (class A)				(9)				(9)
Issuance of stock under ESPP shares of Common Stock (class A)			(1)	1
Dividends declared						(114)		(114)
Stock bonuses			(1)	2				1
Other comprehensive income (loss), net of tax					28		13	41
Net income (loss)						779	(61)	718
Balance at Mar. 31, 2019	347	52	15,647	(1,891)	(230)	7,680	562	22,167
Balance at Jun. 30, 2019	347	52	15,646	(1,888)	(206)	7,761	467	22,179
Purchases of shares of Common Stock (class A)				(74)				(74)
Issuance of stock under ESPP shares of Common Stock (class A)			(1)	3				2
Dividends declared						(341)		(341)
Stock bonuses			(3)	6				3
Stock-based compensation expense			(6)					(6)
Deconsolidation of non-controlling interest							(463)	(463)
Other comprehensive income (loss), net of tax					197		114	311
Net income (loss)						(6,182)	(118)	(6,300)
Balance at Mar. 31, 2020	347	52	15,636	(1,953)	(9)	1,238	0	15,311
Balance at Dec. 31, 2019	347	52	15,638	(1,888)	(205)	2,964	379	17,287
Purchases of shares of Common Stock (class A)				(68)				(68)
Issuance of stock under ESPP shares of Common Stock (class A)			(1)	1
Dividends declared						(114)		(114)
Stock bonuses			(1)	2				1
Deconsolidation of non-controlling interest							(463)	(463)
Other comprehensive income (loss), net of tax					196		114	310
Net income (loss)						(1,612)	(30)	(1,642)
Balance at Mar. 31, 2020	$ 347	$ 52	$ 15,636	$ (1,953)	$ (9)	$ 1,238	$ 0	$ 15,311