Note 4 - Major Customers	3 Months Ended
Mar. 31, 2014
Table Text Block [Abstract]
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block]	(4) MAJOR CUSTOMERS During the three months ended March 31, 2014 and 2013, Hakuto Co., Ltd., one of our distributors, accounted for 11% and 10% of our consolidated net revenues, respectively. These revenues were generated by our Thermal Products segment. No other customers accounted for 10% or more of our consolidated net revenues during the three months ended March 31, 2014 and 2013.

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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