Note 3 - Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Mar. 31, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Business Acquisition, Cost of Acquired Entity, Purchase Price	$ 3,802			$ 3,802	$ 3,802
Restructuring Charges		359			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	10,799		11,681	3,467	35,106	37,185
Closure Costs [Member] | Thermonics [Member]
Restructuring Charges						$ 359