Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Activity of Allowance for Doubtful Accounts

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

	June 30, 2015			December 31, 2014
	(in thousands)
Beginning balance	$	140		$	50
Charges to costs and expenses		(72	)		105
Accounts charged off, less recoveries		15			(15	)
Ending balance	$	83		$	140

Inventories

Inventories are composed of the following:

	June 30, 2015		December 31, 2014
	(in thousands)
Raw materials	$	11,498	$	14,503
Work in progress		8,663		6,357
Finished goods		1,955		1,879
	$	22,116	$	22,739

Property and Equipment

Property and equipment consisted of the following:

	June 30, 2015			December 31, 2014
	(in thousands)
Land and land improvements	$	4,133		$	4,133
Buildings		32,461			32,482
Machinery, equipment and tooling		127,530			127,158
Leasehold improvements		7,302			7,640
Furniture and fixtures		961			961
Information systems		1,140			1,140
Construction in progress		3,631			3,734
Total cost		177,158			177,248
Accumulated depreciation and amortization		(75,764	)		(69,572	)
Property and equipment, net	$	101,394		$	107,676

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

At June 30, 2015 and 2014, the Company had the following anti-dilutive securities outstanding which were excluded from the calculation of diluted net loss per share:

	June 30, 2015		June 30, 2014
Warrants		—		170,323
Stock options		8,102		354,793
Total		8,102		525,116

Components of Comprehensive Loss

The following table summarizes the components of comprehensive loss:

	June 30, 2015			December 31, 2014
	(in thousands)
Reclassification of unrealized gain included in net loss	$	—		$	388
Unrealized loss on investments		(18	)		(415	)
Unrealized loss on currency translation		(15	)		(16	)
Ending Balance	$	(33	)	$	(43	)