Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Activity of Allowance for Doubtful Accounts

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

	March 31, 2016			December 31, 2015
	(in thousands)
Beginning balance	$	389		$	140
Charges to costs and expenses		(54	)		235
Accounts charged off, less recoveries		—			14
Ending balance	$	335		$	389

Inventories

Inventories are composed of the following:

	March 31, 2016		December 31, 2015
	(in thousands)
Raw materials	$	6,943	$	7,346
Work in progress		10,745		9,920
Finished goods		3,165		4,067
	$	20,853	$	21,333

Property and Equipment

Property and equipment consisted of the following:

	March 31, 2016			December 31, 2015
	(in thousands)
Land and land improvements	$	4,133		$	4,133
Buildings		26,103			26,097
Machinery, equipment and tooling		50,969			50,364
Leasehold improvements		7,141			7,141
Furniture and fixtures		816			816
Information systems		1,121			1,105
Construction in progress		1,249			1,327
Total cost		91,532			90,983
Accumulated depreciation and amortization		(35,056	)		(33,414	)
Property and equipment, net	$	56,476		$	57,569

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

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

	2015
Warrants		38,219
Stock options		21,952
		60,171

Components of Comprehensive Loss

The following table summarizes the components of comprehensive loss:

	March 31, 2016			December 31, 2015
	(in thousands)
Unrealized loss on investments	$	(12	)	$	(17	)
Unrealized loss on currency translation		(18	)		(16	)
Ending Balance	$	(30	)	$	(33	)