RESTATEMENT OF UNAUDITED CONSOLIDATED FINANCIAL STATEMENTS (Details) - Schedule of Error Corrections and Prior Period Adjustments - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019
Current Assets
Cash and cash equivalents	$ 9,479		$ 1,936
Restricted cash	1,000		1,025
Investments in securities at fair value	6,322		6,322
Accounts and other receivables	2,645		974
Prepaid expenses	430		285
Total Current Assets	19,876		10,542
Net Property and Equipment	1,388		1,506
Other Assets
Investments in equity securities at fair value, non-current	16,939		5,142
Investments in available-for-sale debt securities at fair value	23,927		0
Other investments	2,940		1,283
Investments in held-to-maturity debt securities	1,000		0
Equity method investments	596		158
Right of use assets	56		93
Other assets, non-current	100		92
Total Other Assets	45,558		6,768
Total Assets	66,822		18,816
Current Liabilities
Accounts payable	72		29
Accrued compensation and related costs	747		360
Dividends payable	226		113
Lease liability, short-term	52		50
Other accrued expenses	1,226		1,015
Taxes payable	3,472		0
Note payable, current	0		442
Total Current Liabilities	5,795		2,009
Long-Term Liabilities
Deferred tax liability	5,897		0
Lease liability, long-term	4		43
Total Long-Term Liabilities	5,901		43
Total Liabilities	11,696		2,052
Shareholders’ Equity
Additional paid-in-capital	15,628		15,623
Treasury stock, class A shares at cost; 883,326 shares and 855,432 shares at March 31, 2021, and June 30, 2020, respectively	(2,051)		(1,879)
Accumulated other comprehensive income (loss), net of tax	11,840	$ 8	(4)	$ (9)	$ (205)	$ (206)
Retained earnings	29,310		2,625
Total Shareholders’ Equity	55,126	$ 35,112	16,764	$ 15,311	$ 17,287	$ 22,179
Total Liabilities and Shareholders’ Equity	66,822		18,816
Common Class A [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	347		347
Common Class B [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	0		0
Common Class C [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	52		$ 52
Previously Reported [Member]
Current Assets
Cash and cash equivalents	9,479
Restricted cash	1,000
Investments in securities at fair value	6,322
Accounts and other receivables	2,645
Prepaid expenses	430
Total Current Assets	19,876
Net Property and Equipment	1,388
Other Assets
Investments in equity securities at fair value, non-current	18,635
Investments in available-for-sale debt securities at fair value	16,470
Other investments	2,940
Investments in held-to-maturity debt securities	1,000
Equity method investments	596
Right of use assets	56
Other assets, non-current	100
Total Other Assets	39,797
Total Assets	61,061
Current Liabilities
Accounts payable	72
Accrued compensation and related costs	692
Dividends payable	226
Lease liability, short-term	52
Other accrued expenses	1,221
Taxes payable	3,515
Note payable, current	0
Total Current Liabilities	5,778
Long-Term Liabilities
Deferred tax liability	4,681
Lease liability, long-term	4
Total Long-Term Liabilities	4,685
Total Liabilities	10,463
Shareholders’ Equity
Additional paid-in-capital	15,628
Treasury stock, class A shares at cost; 883,326 shares and 855,432 shares at March 31, 2021, and June 30, 2020, respectively	(2,051)
Accumulated other comprehensive income (loss), net of tax	1,695
Retained earnings	34,927
Total Shareholders’ Equity	50,598
Total Liabilities and Shareholders’ Equity	61,061
Previously Reported [Member] | Common Class A [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	347
Previously Reported [Member] | Common Class B [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	0
Previously Reported [Member] | Common Class C [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	52
Revision of Prior Period, Adjustment [Member]
Current Assets
Cash and cash equivalents	0
Restricted cash	0
Investments in securities at fair value	0
Accounts and other receivables	0
Prepaid expenses	0
Total Current Assets	0
Net Property and Equipment	0
Other Assets
Investments in equity securities at fair value, non-current	(1,696)
Investments in available-for-sale debt securities at fair value	7,457
Other investments	0
Investments in held-to-maturity debt securities	0
Equity method investments
Right of use assets	0
Other assets, non-current	0
Total Other Assets	5,761
Total Assets	5,761
Current Liabilities
Accounts payable	0
Accrued compensation and related costs	55
Dividends payable	0
Lease liability, short-term	0
Other accrued expenses	5
Taxes payable	(43)
Note payable, current
Total Current Liabilities	17
Long-Term Liabilities
Deferred tax liability	1,216
Lease liability, long-term	0
Total Long-Term Liabilities	1,216
Total Liabilities	1,233
Shareholders’ Equity
Additional paid-in-capital	0
Treasury stock, class A shares at cost; 883,326 shares and 855,432 shares at March 31, 2021, and June 30, 2020, respectively	0
Accumulated other comprehensive income (loss), net of tax	10,145
Retained earnings	(5,617)
Total Shareholders’ Equity	4,528
Total Liabilities and Shareholders’ Equity	5,761
Revision of Prior Period, Adjustment [Member] | Common Class A [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	0
Revision of Prior Period, Adjustment [Member] | Common Class B [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	0
Revision of Prior Period, Adjustment [Member] | Common Class C [Member]
Shareholders’ Equity
Common stock (class A) - $0.025 par value; nonvoting; authorized, 28,000,000 shares; issued, 13,866,913 shares at March 31, 2021, and June 30, 2020	$ 0