Note 4 - Stock-Based Compensation (Detail) - Transactions Related to Stock Options Granted Under These Plans (USD $)	3 Months Ended	9 Months Ended
	Oct. 31, 2012	Oct. 31, 2012	Jan. 30, 2012
Balance, January 31, 2012			380,000
Balance, January 31, 2012 (in Dollars per share)			$ 3.93
Options granted	465,000	465,000
Options granted (in Dollars per share)		$ 0.40
Options canceled or expired		(80,500)
Options canceled or expired (in Dollars per share)		$ 7.90
Balance, October 31, 2012	764,500	764,500	380,000
Balance, October 31, 2012 (in Dollars per share)	$ 1.48	$ 1.48	$ 3.93
Stock Options Exercisable at October 31, 2012	179,325	179,325
Stock Options Exercisable at October 31, 2012 (in Dollars per share)	$ 4.53	$ 4.53