Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Income Tax Contingency [Line Items]
Operating loss carryforwards, not subject to expiration	$ 3,900,000
Valuation allowance	11,045,000	$ 11,813,000
Change in valuation allowance	(767,000)	4,505,000
Reserves for uncertain tax positions and corresponding interest and penalties	275,000	295,000
Accrued interest and penalties	0	$ 0
Internal Revenue Service (IRS)
Income Tax Contingency [Line Items]
Operating loss carryforwards	36,800,000
Change in valuation allowance	768,000
State
Income Tax Contingency [Line Items]
Operating loss carryforwards, subject to expire next twenty fiscal years	$ 17,170,000