GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Goodwill [Roll Forward]
Goodwill	$ 4,637
Goodwill, Acquired During Period	1,930
Goodwill, Translation Adjustments	55
Goodwill	6,622
Energy & Security Sonar Solutions Segment [Member]
Goodwill [Roll Forward]
Goodwill	527
Goodwill, Acquired During Period	0
Goodwill, Translation Adjustments	(12)
Goodwill	515
GridSense segment [Member]
Goodwill [Roll Forward]
Goodwill	2,708
Goodwill, Acquired During Period	0
Goodwill, Translation Adjustments	67
Goodwill	2,775
USSI segment [Member]
Goodwill [Roll Forward]
Goodwill	1,402
Goodwill, Acquired During Period	0
Goodwill, Translation Adjustments	0
Goodwill	1,402
Power Generation Monitoring segment [Member]
Goodwill [Roll Forward]
Goodwill	0
Goodwill, Acquired During Period	1,517
Goodwill, Translation Adjustments	0
Goodwill	1,517
All Other Segments [Member]
Goodwill [Roll Forward]
Goodwill	0	[1]
Goodwill, Acquired During Period	413	[1]
Goodwill, Translation Adjustments	0	[1]
Goodwill	$ 413	[1]

[1] * Results for the Cathodic Protection segment are included in "Other" in Segment Reporting (see Note 11).