Note 7 - Commitments and Contingencies (Details Textual) (USD $) In Millions, unless otherwise specified	1 Months Ended
Jul. 31, 2014	Jan. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Guaranteed Residual Value of Assets Under Operating Leases		$ 5
Lessee Leasing Arrangements, Operating Leases, Renewal Term	3 years

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