Property and Equipment - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	12 Months Ended			1 Months Ended	9 Months Ended	1 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Feb. 29, 2012 Ponca City [Member]	Dec. 31, 2011 Ponca City [Member]	Sep. 30, 2012 Ponca City [Member]	Apr. 30, 2011 Ponca City [Member]	Jun. 30, 2011 Minot North Dakota [Member]	Sep. 30, 2011 Minot North Dakota [Member]	Aug. 31, 2011 Marikina City [Member]	Nov. 30, 2010 Marikina City [Member]
Property, Plant and Equipment [Line Items]
Estimated amount of losses to be recovered								$ 1,400,000
Insurance recoveries for clean up repair and out of pocket expenses					200,000	1,200,000
Insurance recoveries for clean up and repairs						900,000
Insurance recoveries for reimbursement of out of pocket expenses						300,000
Additional funds recoverable from insurance company							0
Proceeds from sale of assets			422,000	3,949,000					3,900,000
Selling costs									200,000
Net gain on sale	(199,000)	8,000	(83,000)	3,432,000					3,700,000	3,700,000
Assets previously classified as held and used with carrying value included in property and equipment									800,000
Deferred grants held for sale included in the balance sheet									600,000
Net gain on insurance settlement											$ 400,000	$ 2,000,000