Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2012

Summary of Significant Accounting Policies [Abstract]

Activity of allowance for doubtful accounts

	June 30, 2012			December 31, 2011
	(in thousands)
Beginning balance	$	378		$	194
Charges to costs and expenses		(260	)		1,873
Accounts charged off, less recoveries		(4	)		(1,689	)
Ending balance	$	114		$	378

Inventories

	June 30, 2012		December 31, 2011
	(in thousands)
Raw materials	$	17,775	$	7,835
Work in progress		17,035		9,776
Finished goods		4,003		5,212
		38,813		22,823

Property and equipment

	June 30, 2012			December 31, 2011
	(in thousands)
Land and land improvements	$	4,133		$	2,540
Buildings		28,527			26,915
Machinery, equipment and tooling		101,869			98,276
Leasehold improvements		7,696			7,712
Furniture and fixtures		941			834
Information systems		986			954
Construction in progress		16,960			17,530
Total cost		161,112			154,761
Accumulated depreciation and amortization		(39,708	)		(33,830	)
Property and equipment, net	$	121,404		$	120,931

Anti-dilutive securities outstanding excluded from calculation of diluted net loss per share

	June 30, 2012
Warrants		177,153
Stock options		326,343
		503,496

Activity of accumulated comprehensive income (loss)

	June 30, 2012			December 31, 2011
	(in thousands)
Beginning Balance	$	(50	)	$	(10	)
Unrealized gain (loss) on investments		42			(42	)
Unrealized gain (loss) on currency translation		(5	)		2
Ending Balance	$	(12	)	$	(50	)