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Income Taxes (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Income Tax Disclosure [Abstract]        
Provision (benefit) for income taxes $ (33,000) $ 336,000 $ 680,000 $ 817,000
Unrecognized tax benefits 4,300,000   4,300,000  
Unrecognized tax benefits that would impact effective tax rate 0   0  
Decrease in unrecognized tax benefits is reasonably possible $ 0   $ 0