Income Taxes (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 336,000	$ 103,000	$ 817,000	$ 253,000
Unrecognized tax benefits	5,200,000		5,200,000
Unrecognized tax benefits that would impact effective tax rate	0		0
Decrease in unrecognized tax benefits is reasonably possible	$ 0		$ 0