Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2014

Accounting Policies [Abstract]

Activity of Allowance for Doubtful Accounts

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

	September 30, 2014			December 31, 2013
	(in thousands)
Beginning balance	$	50		$	286
Charges to costs and expenses		27			24
Accounts charged off, less recoveries		(15	)		(260	)
Ending balance	$	62		$	50

Inventories

Inventories are composed of the following:

	September 30, 2014		December 31, 2013
	(in thousands)
Raw materials	$	15,377	$	18,651
Work in progress		5,695		10,337
Finished goods		1,988		5,324
	$	23,060	$	34,312

Property and Equipment

Property and equipment consisted of the following:

	September 30, 2014			December 31, 2013
	(in thousands)
Land and land improvements	$	4,133		$	4,133
Buildings		32,482			32,269
Machinery, equipment and tooling		125,051			121,313
Leasehold improvements		7,640			7,696
Furniture and fixtures		961			949
	September 30, 2014			December 31, 2013
	(in thousands)
Information systems		1,095			1,077
Construction in progress		5,275			5,221
Total cost		176,637			172,658
Accumulated depreciation and amortization		(66,290	)		(57,438	)
Property and equipment, net	$	110,347		$	115,220

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

At September 30, 2014 and 2013, the Company had the following anti-dilutive securities outstanding which were excluded from the calculation of diluted net loss per share:

	September 30, 2014		September 30, 2013
Warrants		117,522		170,518
Stock options		142,104		316,730
		259,626		487,248

Components of Comprehensive Income (Loss)

The following table summarizes the components of comprehensive income (loss):

	September 30, 2014			December 31, 2013
	(in thousands)
Unrealized gain (loss) on investments, net of taxes	$	133		$	(406	)
Unrealized loss on currency translation		(13	)		(12	)
Ending Balance	$	120		$	(418	)