Business Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intra-segment and Inter-segment Revenues
Income from operations	$ 4,285	$ 2,845	$ 8,032	$ 5,260
Property and equipment additions	59	96	132	256
Depreciation and Amortization	292	369	610	746
Identifiable Assets	77,946		77,946			79,345
Goodwill	14,668		14,668		14,661	14,661	14,713
Engineered Equipment Technology and Parts Group [Member]
Intra-segment and Inter-segment Revenues
Income from operations	3,859	2,898	7,164	5,009
Property and equipment additions	32	12	52	66
Depreciation and Amortization	138	215	299	444
Identifiable Assets	43,501		43,501			51,480
Goodwill	14,668		14,668			14,661
Contracting / Services Group [Member]
Intra-segment and Inter-segment Revenues
Income from operations	563	547	1,684	1,378
Property and equipment additions	14		30	9
Depreciation and Amortization	54	57	110	114
Identifiable Assets	24,001		24,001			18,588
Goodwill
Component Parts Group [Member]
Intra-segment and Inter-segment Revenues
Income from operations	1,323	947	2,412	1,854
Property and equipment additions	11	32	38	32
Depreciation and Amortization	47	42	96	83
Identifiable Assets	6,722		6,722			5,577
Goodwill
Corporate and other [Member]
Intra-segment and Inter-segment Revenues
Income from operations	(1,517)	(1,435)	(3,212)	(2,942)
Property and equipment additions	2	52	12	149
Depreciation and Amortization	53	55	105	105
Identifiable Assets	9,127		9,127			9,705
Eliminations [Member]
Intra-segment and Inter-segment Revenues
Income from operations	57	(112)	(16)	(39)
Identifiable Assets	$ (5,405)		$ (5,405)			$ (6,005)