Note 19 - Income taxes (Details) - Net Operating Losses and Tax Credit Carryforwards (USD $) In Thousands, unless otherwise specified				12 Months Ended
	Feb. 01, 2014	Feb. 02, 2013	Feb. 01, 2014 Domestic Tax Authority [Member]	Feb. 01, 2014 Domestic Tax Authority [Member] Minimum [Member]	Feb. 01, 2014 Domestic Tax Authority [Member] Maximum [Member]	Feb. 01, 2014 State and Local Jurisdiction [Member]	Feb. 01, 2014 State and Local Jurisdiction [Member] Minimum [Member]	Feb. 01, 2014 State and Local Jurisdiction [Member] Maximum [Member]	Feb. 01, 2014 Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Net operating losses	$ 4,999	$ 8,426	$ 22,080			$ 34,379			$ 15,861
Net operating losses				Dec. 31, 2023	Dec. 31, 2033		Dec. 31, 2015	Dec. 31, 2034
Net operating losses									Indefinite
Tax credits	$ 6,642	$ 10,936	$ 16,235			$ 16,347
Tax credits				Dec. 31, 2019	Dec. 31, 2034
Tax credits						Indefinite