Note 4 - Unused Availability (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
UNITED STATES
Unused Availability	$ 2,065	$ 1,696
AUSTRALIA
Unused Availability	198	573
Unused Availability	$ 2,263	$ 2,269

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant