Note 10 - Segment Information (Details) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Note 10 - Segment Information (Details) [Line Items]
Number of Reportable Segments	2us-gaap_NumberOfReportableSegments
Revenue, Net	$ 29,266,000us-gaap_SalesRevenueNet	$ 28,036,000us-gaap_SalesRevenueNet
Intersegment Eliminations [Member]
Note 10 - Segment Information (Details) [Line Items]
Revenue, Net	$ 0		$ 0

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration