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
Statement Of Financial Position [Abstract]    
Allowances on trade accounts receivable $ 389 $ 339
Preferred stock, par value $ 1.00 $ 1.00
Preferred stock, shares authorized 500,000 500,000
Common stock, par value $ 0.10 $ 0.10
Common stock, shares authorized 25,500,000 25,500,000
Common stock, shares issued 10,641,000 10,579,000
Common stock, shares outstanding 9,832,000 9,772,000
Treasury stock, shares 809,000 807,000