Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning of fiscal year	$ 295,000	$ 290,000
Additions for tax positions for the current year	32,000	62,000
Additions for tax positions of prior years		3,000
Subtractions for tax positions of prior years	(52,000)	(60,000)
End of fiscal year	$ 275,000	$ 295,000