Note 7 - Debt - Unsecured Notes (Details) - USD ($) $ in Thousands					6 Months Ended
Apr. 05, 2017	Mar. 28, 2017	Mar. 21, 2017	Feb. 06, 2017	Jun. 30, 2017
Notes [Member] \| Kalani Investments Limited [Member]
Amount drawn/repaid	$ 2,958	$ (54)	$ (995)	$ (3,036)	$ (1,127)

The net cash inflow or outflow for borrowing having initial term of repayment within one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 9
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3098-108585

Name:	us-gaap_ProceedsFromRepaymentsOfShortTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration