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Consolidated Statements of Stockholders' Equity (unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Common Class A [Member]
Common Stock [Member]
Common Class B [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Accumulated balance consists of:            
          $ (49,160)
Balance at Jun. 30, 2018 $ 6,302 $ 720 $ 55,641 $ 74,368 $ (49,160) 87,871
Total comprehensive income (loss)       2,510 (875) 1,635
Transfer of historical translation adjustment 40 (40)
Repurchase of shares (154) (3) (777)     (934)
Issuance of stock 8 32     40
Stock-based compensation 19          
Stock-based compensation     155     174
Conversion 15 (15)        
Balance at Dec. 31, 2018 6,182 710 55,051 76,918 (50,075) 88,786
Accumulated balance consists of:            
Translation loss (49,841)
Pension and postretirement plans, net of taxes         (234)  
        $ (50,075) $ (50,075)