CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
CONSOLIDATED BALANCE SHEETS
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, authorized shares	45,000	45,000
Common stock, issued shares	21,103	21,092
Common stock, outstanding shares	21,103	21,092