Note 7 - Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended
Jul. 31, 2014	Aug. 02, 2014
Commitments and Contingencies Disclosure [Abstract]
Guaranteed Residual Value of Assets Under Operating Leases		$ 5.2
Lessee Leasing Arrangements, Operating Leases, Renewal Term	36 months

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration