Note 11 - Business Segment Information (Detail) - Revenues and Accounts Receivable by Major Customers (Current Period) (USD $) In Thousands, unless otherwise specified	3 Months Ended		3 Months Ended
Mar. 31, 2013 Vestas [Member]	Dec. 31, 2012 Vestas [Member]	Dec. 31, 2012 Stand by Energy [Member]	Mar. 31, 2012 Alsher Titania LLC [Member]	Dec. 31, 2012 Alsher Titania LLC [Member]
Sales	$ 1,291			$ 60
Accounts Receivable		$ 179	$ 94	$ 60	$ 60

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.9)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.5)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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