Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013
Condensed Consolidated Balance Sheets [Abstract]
Allowances on trade accounts receivable	$ 37	$ 33
Preferred stock, par value	$ 1.00	$ 1.00
Preferred stock, shares authorized	500	500
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	25,500	25,500
Common stock, shares issued	10,361	10,331
Treasury stock, shares	327	327