Financial Statement Presentation and Significant Accounting Policies - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Jun. 30, 2010 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) Customer $ / shares shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Feb. 28, 2015 $ / shares	Dec. 31, 2012 USD ($)	Jun. 11, 2010 $ / shares
Schedule Of Significant Accounting Policies [Line Items]
Advertising costs		$ 300,000	$ 0	$ 0
Cash held in escrow		3,900,000
Trade accounts receivable allowance		300,000	0
Impairment on property, plant and equipment, identifiable intangible assets, or other long-lived assets		0
Impairment on intangible assets		$ 0	0
Number of shares the warrants may acquire | shares	1,500,000	1,468,333
Purchase price of warrants issued	$ 300,000
Term of warrants	10 years
Exercise price of warrants | $ / shares	$ 10.30	$ 5.64			$ 5.64		$ 10.30
Currency translation gains		$ 300,000
Foreign exchange loss on intercompany loans		(1,300,000)
Deferred tax valuation allowance		382,400,000	385,600,000	$ 375,000,000		$ 373,700,000
Deferred tax valuation allowance released amount based on expected future taxable income			5,100,000
Accumulated other comprehensive loss on foreign currency		$ 7,200,000
Deferred income tax assets to noncurrent deferred income tax assets			$ 5,100,000
Customer Concentration Risk | Consolidated Revenue | One Customer
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		14.40%
Customer Concentration Risk | Consolidated Revenue | Ten Customer
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		60.50%
Customer Concentration Risk | Accounts Receivable
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		10.00%
Number of Major Customers | Customer		2
Customer Concentration Risk | Accounts Receivable | Ten Customer
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		59.70%
Customer Concentration Risk | Accounts Receivable | Customer One | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		20.00%
Customer Concentration Risk | Accounts Receivable | Customer Two | Maximum
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		20.00%
Customer Concentration Risk | Metal Purchases
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		10.00%
Customer Concentration Risk | Metal Purchases | Ten Suppliers
Schedule Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage		22.00%