Note 3 - Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 3,802		$ 3,802	$ 3,802
Restructuring Charges				359
Business Acquisition, Cost of Acquired Entity, Transaction Costs	485	337	485	485	337	148
Business Acquisition, Purchase Price Allocation, Goodwill Amount	50		50	50
Revenues	13,576	13,800	2,044	24,307	25,504
Closure Costs [Member] | Thermonics [Member]
Restructuring Charges					$ 359