Business Segment Information (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Intra-segment and Inter-segment Revenues
Net sales	$ 135,052	$ 139,192
Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Sales revenue net excluding inter segment eliminations	142,256	152,657
Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	(3,277)	(7,156)
Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment	(2,269)	(2,494)
Intersegment Sales Purchases by Contracting or Services Segment	(1,724)	(3,715)
Intersegment Sales Purchases by Component Parts Segment		(50)
Intersegment Sales Purchases by Corporate and Other	66	(50)
Engineered Equipment Technology and Parts Group [Member]
Intra-segment and Inter-segment Revenues
Net sales	88,679	92,498
Revenue from External Customers	88,679	92,498
Engineered Equipment Technology and Parts Group [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	92,301	101,882
Engineered Equipment Technology and Parts Group [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	(2,828)	(6,587)
Engineered Equipment Technology and Parts Group [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment	(794)	(2,797)
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Engineered Equipment Technology and Parts Group [Member] \| United States [Member]
Intra-segment and Inter-segment Revenues
Net sales	75,824	76,416
Revenue from External Customers	75,824	76,416
Engineered Equipment Technology and Parts Group [Member] \| United States [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	77,447	82,946
Engineered Equipment Technology and Parts Group [Member] \| United States [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	(829)	(3,733)
Engineered Equipment Technology and Parts Group [Member] \| United States [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment	(794)	(2,797)
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Engineered Equipment Technology and Parts Group [Member] \| Canada [Member]
Intra-segment and Inter-segment Revenues
Net sales	7,611	7,492
Revenue from External Customers	7,611	7,492
Engineered Equipment Technology and Parts Group [Member] \| Canada [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	7,548	7,492
Engineered Equipment Technology and Parts Group [Member] \| Canada [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	63
Engineered Equipment Technology and Parts Group [Member] \| Canada [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Engineered Equipment Technology and Parts Group [Member] \| Brazil [Member]
Intra-segment and Inter-segment Revenues
Net sales	121	2,214
Revenue from External Customers	121	2,214
Engineered Equipment Technology and Parts Group [Member] \| Brazil [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	121	2,214
Engineered Equipment Technology and Parts Group [Member] \| Brazil [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales
Engineered Equipment Technology and Parts Group [Member] \| Brazil [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Engineered Equipment Technology and Parts Group [Member] \| China [Member]
Intra-segment and Inter-segment Revenues
Net sales	4,905	6,147
Revenue from External Customers	4,905	6,147
Engineered Equipment Technology and Parts Group [Member] \| China [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	6,967	9,001
Engineered Equipment Technology and Parts Group [Member] \| China [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	(2,062)	(2,854)
Engineered Equipment Technology and Parts Group [Member] \| China [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Engineered Equipment Technology and Parts Group [Member] \| India [Member]
Intra-segment and Inter-segment Revenues
Net sales	218	229
Revenue from External Customers	218	229
Engineered Equipment Technology and Parts Group [Member] \| India [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	218	229
Engineered Equipment Technology and Parts Group [Member] \| India [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales
Engineered Equipment Technology and Parts Group [Member] \| India [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Contracting / Services [Member]
Intra-segment and Inter-segment Revenues
Net sales	25,527	26,879
Revenue from External Customers	25,527	26,879
Contracting / Services [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	27,852	29,466
Contracting / Services [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	(83)	(120)
Contracting / Services [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment	(2,242)	(2,355)
Intersegment Sales Purchases by Contracting or Services Segment
Intersegment Sales Purchases by Component Parts Segment		(50)
Intersegment Sales Purchases by Corporate and Other		(62)
Component Parts Group [Member]
Intra-segment and Inter-segment Revenues
Net sales	20,771	18,771
Revenue from External Customers	20,771	18,771
Component Parts Group [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	22,084	20,230
Component Parts Group [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales	(366)	(449)
Component Parts Group [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment	(27)	(139)
Intersegment Sales Purchases by Contracting or Services Segment	(920)	(871)
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other
Corporate and other [Member]
Intra-segment and Inter-segment Revenues
Net sales	75	1,044
Revenue from External Customers	75	1,044
Corporate and other [Member] \| Intra and Inter Segment [Member]
Intra-segment and Inter-segment Revenues
Net sales	19	1,079
Corporate and other [Member] \| Inter-segment Elimination [Member]
Intra-segment and Inter-segment Revenues
Segment reporting intra segment sales
Corporate and other [Member] \| Intra-segment [Member]
Intra-segment and Inter-segment Revenues
Intersegment Sales Purchases by Engineered Equipment Technology and Parts Segment
Intersegment Sales Purchases by Contracting or Services Segment	(10)	(47)
Intersegment Sales Purchases by Component Parts Segment
Intersegment Sales Purchases by Corporate and Other	$ 66	$ 12