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STOCKHOLDERS' EQUITY (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended 84 Months Ended
Sep. 30, 2020
$ / shares
Jun. 30, 2020
USD ($)
$ / shares
shares
Jun. 30, 2019
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Jun. 30, 2018
shares
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Stock Repurchase Program, Remaining Authorized Repurchase Amount (in Dollars) | $   $ 2,640      
Repurchasing Amount (in Dollars) | $   $ 113 $ 24    
Number of options granted   0 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   2,000 4,000   4,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period   0 0    
Monthly Dividends Paid [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Common Stock, Dividends, Per Share, Cash Paid (in Dollars per share) | $ / shares   $ 0.0025 $ 0.0025    
Forecast [Member] | Monthly Dividend Authorized [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Monthly dividend (in Dollars per share) | $ / shares $ 0.0025        
Common Class B [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Common Stock, Shares, Issued   0 0    
Common Class A [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Common Stock, Shares, Issued   13,866,913 13,866,751    
Dividends, Cash (in Dollars) | $   $ 390 $ 392    
Number of shares repurchased   105,721 20,575    
Repurchasing Amount (in Dollars) | $   $ 113 $ 24    
Common Class A [Member] | 1989 Plan [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Number of shares authorized under Stock Option Plan   1,600,000      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights   six months from the grant date or 20 percent on the first, second, third, fourth, and fifth anniversaries of the grant date      
Annual award vesting, percentage   20.00%      
Stock Option Plan expiration   10 years      
Number of options granted   0 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   0      
Common Class A [Member] | 1997 Plan [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Number of shares authorized under Stock Option Plan   400,000      
Stock Option Plan expiration   10 years      
Number of options granted   0 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   2,000      
Number of options, options forfeited   2,000 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period   0 0    
Common Class A [Member] | Director [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Class A common stock granted   3,600 3,600    
Class A common stock granted (in Dollars per share) | $ / shares   $ 1.61 $ 1.34    
Common Class A [Member] | Key Advisor [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Class A common stock granted   50,000 0    
Class A common stock granted (in Dollars per share) | $ / shares   $ 1.95      
Common Class A [Member] | Employee and Director [Member] | Treasury Stock [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Adjustment to additional paid in capital from shares issued with a weighted average cost basis greater than the current fair value (in Dollars) | $   $ (17) $ (6)    
Common Class C [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Common Stock, Shares, Issued   2,068,635 2,068,797    
Dividends, Cash (in Dollars) | $   $ 62 $ 62    
Number of shares converted   (162) (60)    
Conversion ratio, shares issued as a result of stock conversion   1 1    
Share Repurchase Plan, December 2012 Renewal, December 2013, December 2014, December 2015, December 2016, December 2017, December 2018 and December 2019 [Member]          
STOCKHOLDERS' EQUITY (Details) [Line Items]          
Stock repurchase program, authorized amount (in Dollars) | $   $ 2,750      
Repurchasing Amount (in Dollars) | $       $ 1,500  
Number of shares repurchased       666,531