Note 14 - Equity Incentive Plans and Employee Benefits - Stock Option Activities and Balances of Stock Option Plans (Details) - USD ($)	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Options Outstanding (in shares)	2,665,571	2,933,671	3,768,058
Options Outstanding (in dollars per share)	$ 11.25	$ 11.57	$ 10.86
Options Outstanding (Year)	2 years 3 days	4 years 182 days	4 years 73 days	4 years 328 days
Granted (in shares)	45,900	483,400	104,200
Granted (in dollars per share)	$ 6.16	$ 6.87	$ 8.74
Cancelled (in shares)	(475,870)	(556,616)	(415,146)
Cancelled (in dollars per share)	$ 14.88	$ 11.41	$ 10.39
Exercised (in shares)	(409,608)	(194,884)	(523,441)
Exercised (in dollars per share)	$ 5.34	$ 4.75		$ 6.83
Options Outstanding (in shares)	1,825,993	2,665,571	2,933,671	3,768,058
Options Outstanding (in dollars per share)	$ 11.51	$ 11.25	$ 11.57	$ 10.86
Aggregate Intrinsic Value	$ 122,157
Ending vested and expected to vest (in shares)	1,825,993
Ending vested and expected to vest (in dollars per share)	$ 11.51
Ending vested and expected to vest (Year)	2 years 3 days
Ending vested and expected to vest	$ 122,157
Ending exercisable (in shares)	1,648,155
Ending exercisable (in dollars per share)	$ 12.02
Ending exercisable (Year)	1 year 160 days
Ending exercisable	$ 99,880