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Consolidated Balance Sheets (Parentheticals) (USD $)
Dec. 31, 2012
Mar. 31, 2012
Statement Of Financial Position [Abstract]    
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, par value (in dollars per share)      
Preferred stock, shares issued      
Common stock, shares authorized 50,000,000 50,000,000
Common stock, par value (in dollars per share)      
Common stock, shares issued 12,114,559 11,960,975
Common stock, shares outstanding 12,114,559 11,960,975