Business Segment Information - Property and Equipment Additions, Depreciation and Amortization and Identifiable Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Property and equipment additions	$ 183	$ 59	$ 236	$ 132
Depreciation and amortization	899	292	1,313	610
Identifiable Assets	117,560		117,560		94,104
Engineered Equipment Technology and Parts [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	146	32	183	52
Depreciation and amortization	768	138	1,051	299
Identifiable Assets	99,772		99,772		60,516
Contracting / Services [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	11	14	21	30
Depreciation and amortization	52	54	104	110
Identifiable Assets	6,355		6,355		8,055
Component Parts [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	26	11	32	38
Depreciation and amortization	47	47	93	96
Identifiable Assets	6,423		6,423		5,573
Corporate [Member]
Segment Reporting Information [Line Items]
Property and equipment additions	0	2	0	12
Depreciation and amortization	32	53	65	105
Identifiable Assets	$ 5,010		$ 5,010		$ 19,960