Consolidated Balance Sheets (Parentheticals) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Statement Of Financial Position [Abstract]
Preferred stock, no par value (in dollars per share)
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Common stock, no par value (in dollars per share)
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	12,154,069	11,960,975