Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Accounting Policies [Abstract]

Activity of Allowance for Doubtful Accounts

The following table shows the activity of the allowance for doubtful accounts:

	March 31, 2015			December 31, 2014
	(in thousands)
Beginning balance	$	140		$	50
Charges to costs and expenses		(63	)		105
Accounts charged off, less recoveries		—			(15	)
Ending balance	$	77		$	140

Inventories

Inventories are composed of the following:

	March 31, 2015		December 31, 2014
	(in thousands)
Raw materials	$	12,913	$	14,503
Work in progress		7,468		6,357
Finished goods		1,417		1,879
	$	21,798	$	22,739

Property and Equipment

Property and equipment consisted of the following:

	March 31, 2015			December 31, 2014
	(in thousands)
Land and land improvements	$	4,133		$	4,133
Buildings		32,487			32,482
Machinery, equipment and tooling		127,404			127,158
Leasehold improvements		7,640			7,640
Furniture and fixtures		961			961
Information systems		1,140			1,140
Construction in progress		3,650			3,734
Total cost		177,415			177,248
Accumulated depreciation and amortization		(72,822	)		(69,572	)
Property and equipment, net	$	104,593		$	107,676

Anti-Dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share

At March 31, 2015 and 2014, the Company had the following anti-dilutive securities outstanding which were excluded from the calculation of diluted net loss per share:

	March 31, 2015		March 31, 2014
Warrants		38,219		175,832
Stock options		21,952		357,511
		60,171		533,343

Components of Comprehensive Loss

The following table summarizes the components of comprehensive loss:

	March 31, 2015			December 31, 2014
	(in thousands)
Reclassification of unrealized gain included in net loss	$	—		$	388
Unrealized loss on investments, net of taxes		(22	)		(415	)
Unrealized loss on currency translation		(15	)		(16	)
Ending Balance	$	(37	)	$	(43	)