SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Activity of Allowance for Doubtful Accounts

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

	Year ended December 31,
	2013			2012
	(in thousands)
Beginning balance	$	286		$	378
Charges to costs and expenses		24			(54	)
Accounts charged off, less recoveries		(260	)		(38	)
Ending balance	$	50		$	286

Inventories

 Inventories are composed of the following:

	As of December 31,
	2013		2012
	(in thousands)
Raw materials	$	18,651	$	21,267
Work in progress		10,337		20,787
Finished goods		5,324		5,300
	$	34,312	$	47,354

Property and Equipment

Property and equipment consisted of the following:

	As of December 31,
	2013			2012
	(in thousands)
Land and land improvements	$	4,133		$	4,133
Buildings		32,269			30,364
Machinery, equipment and tooling		121,313			103,477
Leasehold improvements		7,696			7,696
Furniture and fixtures		949			941
Information systems		1,077			1,070
Construction in progress		5,221			17,712
Total cost		172,658			165,393
Accumulated depreciation and amortization		(57,438	)		(45,543	)
Property and equipment, net	$	115,220		$	119,850

Property and Equipment, Estimated Useful Lives

The estimated useful lives are as follows:

Asset description	Life
Buildings	39 years
Machinery, equipment and tooling	3-10 years
Leasehold improvements	Lesser of life of lease or economic life
Furniture and fixtures	7 years
Information systems	3 years

Product Warranty Liability

The following table presents changes in the Company’s product warranty liability:

	Year ended December 31,
	2013			2012
	(in thousands)
Balance, beginning of period	$	101		$	253
Charged to cost of sales		102			(37	)
Actual product warranty expenditures		(62	)		(115	)
Balance, end of period	$	141		$	101

Components of Comprehensive Income (Loss)

A summary of the components of comprehensive income (loss) for the years ended December 31, 2013 and 2012 follows:

	Year Ended December 31,
	2013			2012
	(in thousands)
Unrealized (loss) gain on investments, net of tax	$	(406	)	$	457
Unrealized loss on currency translation		(12	)		(10	)
Ending Balance	$	(418	)	$	447

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

The number of anti-dilutive shares excluded from the calculation of diluted net loss per share is as follows as of December 31:

	2013		2012
Warrants		179,252		143,291
Stock options		56,892		266,020
		236,144		409,311