Discontinued Operations (Results of Operations from Discontinued Operations) (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of assets, disposal group, before benefit from income taxes			$ (320,000)
Loss on disposal before provision for income taxes				(248,000)
(Loss) income from discontinued operations, net of tax	(484,000)	(1,075,000)	(1,431,000)	1,399,000
DirectStar [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		25,300,000		60,200,000
Income (loss) from operations before (provision for) benefit from income taxes		800,000		6,200,000
Loss on disposal before provision for income taxes		(200,000)		(200,000)
(Provision for) benefit from income taxes		(300,000)		(2,300,000)
(Loss) income from discontinued operations, net of tax		300,000		3,700,000
Globetec [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	6,900,000	3,400,000	13,200,000	8,700,000
Income (loss) from operations before (provision for) benefit from income taxes	(900,000)	(1,700,000)	(2,100,000)	(3,200,000)
Impairment of assets, disposal group, before benefit from income taxes	(300,000)	0	(300,000)	0
(Provision for) benefit from income taxes	700,000	300,000	1,000,000	900,000
(Loss) income from discontinued operations, net of tax	$ (500,000)	$ (1,400,000)	$ (1,400,000)	$ (2,300,000)