Discontinued Operations (Summary of Assets and Liabilities) (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Assets
Current assets	$ 20,091,000	$ 18,591,000
Globetec [Member]
Assets
Current assets	20,100,000	18,600,000
Property and equipment, net	2,000,000	2,000,000
Goodwill and other intangible assets, net	0	0
Other long-term assets	5,700,000	5,700,000
Assets of discontinued operations	27,800,000	26,200,000
Liabilities
Accounts payable and accrued expenses	300,000	900,000
Other current liabilities	2,200,000	3,700,000
Liabilities of discontinued operations	$ 2,500,000	$ 4,600,000