Related Party Transaction - Additional Information (Detail) - USD ($)			3 Months Ended	12 Months Ended
	Oct. 07, 2016	Jun. 08, 2016	Jan. 31, 2017	Jan. 31, 2017	Jan. 31, 2016
Related Party Transaction [Line Items]
Stock issued during period			343,000	343,000	0
Maximum number of preferred stock to be issued			1,000,000	1,000,000	1,000,000
Net proceeds from preferred stock			$ 346,000
Series A Preferred Stock [Member]
Related Party Transaction [Line Items]
Stock issued during period		320,000
Series A Preferred Stock [Member] | Ladenburg Thalmann & Co. Inc. [Member]
Related Party Transaction [Line Items]
Underwriting discounts, commissions and fees		$ 440,000
Percentage of structuring fee received		0.50%
Structuring fee to underwriter		$ 40,000
Maximum number of preferred stock to be issued	500,000
Percentage of compensation fees to be paid	2.00%
Stock issued during period			15,184	23,174
Gross proceeds from preferred stock			$ 353,000	$ 543,000
Equity distribution compensation expenses			7,000	$ 11,000
Series A Preferred Stock [Member] | Non-Executive Chairman [Member]
Related Party Transaction [Line Items]
Underwriting discounts, commissions and fees		$ 0
Equity distribution compensation expenses			$ 0