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CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
shares in Thousands, $ in Thousands
Jun. 30, 2015
Mar. 31, 2015
Statement Of Financial Position [Abstract]    
Allowance for doubtful accounts receivable (in dollars) $ 23 $ 8
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000 5,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 40,000 40,000
Common stock, shares issued 20,259 20,262
Common stock, shares outstanding 20,259 20,262
Convertible Preferred Stock    
Preferred stock, shares issued 3 3
Preferred stock, shares outstanding 3 3
Preferred stock, liquidation preference (in dollars per share) $ 4 $ 4