Private Placement Investment - Schedule of Warrants Issued and Outstanding (Details) - $ / shares	Jan. 31, 2018	Aug. 16, 2012
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares issuable (in shares)		1,200,000
Weighted average exercise price (in USD per share)		$ 3.99
Common Stock Warrant
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares issuable (in shares)	1,400,000
Weighted average exercise price (in USD per share)	$ 4.00
Private Placement | Common Stock Warrant
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares issuable (in shares)	1,200,000
Weighted average exercise price (in USD per share)	$ 3.99
Placement Agent | Common Stock Warrant
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares issuable (in shares)	200,000
Weighted average exercise price (in USD per share)	$ 4.06