Note 13 - Segment Information (Details) - Revenue By Product Family In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 AFN	Dec. 31, 2011 USD ($)	Dec. 31, 2013 DC To DC Converters [Member] USD ($)	Dec. 31, 2012 DC To DC Converters [Member] AFN	Dec. 31, 2011 DC To DC Converters [Member] USD ($)	Dec. 31, 2013 Lighting Control Products [Member] USD ($)	Dec. 31, 2012 Lighting Control Products [Member] AFN	Dec. 31, 2011 Lighting Control Products [Member] USD ($)
Revenue from External Customer [Line Items]
Revenue	$ 238,091	$ 213,813	213,813	$ 196,519	$ 211,337	188,736	$ 170,032	$ 26,754	25,077	$ 26,487
Percent of Revenue (in Afghanis)	$ 238,091	$ 213,813	213,813	$ 196,519	$ 211,337	188,736	$ 170,032	$ 26,754	25,077	$ 26,487

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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