Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	27,876,176	27,857,217
Common stock, shares outstanding	27,876,176	27,857,217