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CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)
Mar. 31, 2013
Mar. 31, 2012
STOCKHOLDER'S EQUITY:    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 40,000,000 40,000,000
Common stock, shares issued (in shares) 17,809,677 17,781,538
Common stock, shares outstanding (in shares) 17,666,598 17,638,459