Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical)

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2018
Mar. 31, 2018
Accounts receivable, allowance $ 70 $ 95
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Treasury stock, shares 5,030,577 4,633,871
Class A Common Stock    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 109,000,000 109,000,000
Common stock, shares outstanding 11,991,441 12,145,743
Class B Common Stock    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares issued 3,484,287 3,484,287
Common stock, shares outstanding 3,484,287 3,484,287