Note 8 - Stock Compensation - Stock Options Activity (Details) - $ / shares	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Balance, stock options (in shares)	950,000	600,000
Balance, stock options, weighted-average exercise price (in dollars per share)	$ 0.66	$ 0.96
Options granted (in shares)	396,189	350,000
Options granted, weighted-average exercise price (in dollars per share)	$ 0.10	$ 0.15
Options canceled or expired (in shares)	(246,189)
Options canceled or expired, weighted-average exercise price (in dollars per share)	$ 1.06
Options exercise (in shares)
Options exercise, weighted-average exercise price (in dollars per share)
Balance, stock options (in shares)	1,100,000	950,000
Balance, stock options, weighted-average exercise price (in dollars per share)	$ 0.37	$ 0.66
Stock options exercisable (in shares)	760,000
Stock options exercisable, weighted-average exercise price (in dollars per share)	$ 0.44