Note 14 - Foreign Revenues and Operations (Detail) - Foreign Revenues (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Revenues	$ 16,530		$ 16,324
United Kingdom [Member]
Revenues	1,154		1,352
Pacific Rim [Member]
Revenues	562	[1]	483	[1]
Canada [Member]
Revenues	518		418
Brazil [Member]
Revenues	25		79
Other [Member]
Revenues	54		43
Foreign [Member]
Revenues	2,313		2,375
United States [Member]
Revenues	$ 14,217		$ 13,949

[1] Includes Australia, New Zealand, Japan and Singapore