Note 9 - Fair Value Measurements - Fair Value Hierarchy for Non-financial Assets (Details) - Fair Value, Measurements, Nonrecurring [Member]	Jun. 30, 2015 USD ($)
Fair Value, Inputs, Level 1 [Member]
Non-financial assets measured at fair value
Fair Value, Inputs, Level 2 [Member]
Non-financial assets measured at fair value
Fair Value, Inputs, Level 3 [Member]
Non-financial assets measured at fair value	$ 438,000
Non-financial assets measured at fair value	$ 438,000

Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258

Name:	us-gaap_FiniteLivedIntangibleAssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant