The following tables summarize the Company’s quarterly financial information for the years ended December 31, 2013 and 2012 (in thousands except per share amounts):


	Three Months Ended
	March 31, 2013			June 30, 2013			September 30, 2013			December 31, 2013
Revenue:
Product revenue	$	9,733		$	10,150		$	10,542		$	9,232
Cost of product revenue		5,090			5,747			6,826			4,939

Gross profit on product revenue		4,643			4,403			3,716			4,293
Government grants and cooperative agreements revenue		—			—			—			—
Operating expenses:
Research and development		2,700			3,506			4,363			4,618
Selling, general and administrative		6,853			7,954			7,728			7,430
Amortization of intangible assets		50			51			50			51

Total operating expenses		9,603			11,511			12,141			12,099

Loss from operations		(4,960	)		(7,108	)		(8,425	)		(7,806	)
Total non-operating income (expense), net		(5,241	)		438			(12,016	)		1,999

Loss before income taxes		(10,201	)		(6,670	)		(20,441	)		(5,807	)
Provision for income taxes		51			54			60			53

Net loss	$	(10,252	)	$	(6,724	)	$	(20,501	)	$	(5,860	)

Net loss per common share:
Basic	$	(0.17	)	$	(0.10	)	$	(0.29	)	$	(0.08	)
Diluted	$	(0.17	)	$	(0.10	)	$	(0.29	)	$	(0.10	)


	Three Months Ended
	March 31, 2012			June 30, 2012			September 30, 2012			December 31, 2012
Revenue:
Product revenue	$	8,691		$	9,224		$	8,252		$	10,528
Cost of product revenue		5,514			5,574			4,411			5,117

Gross profit on product revenue		3,177			3,650			3,841			5,411
Government grants and cooperative agreements revenue		91			—			—			—
Operating expenses:
Research and development		1,824			1,712			1,903			2,164
Selling, general and administrative		5,966			6,686			6,219			6,794
Amortization of intangible assets		50			51			50			51

Total operating expenses		7,840			8,449			8,172			9,009

Loss from operations		(4,572	)		(4,799	)		(4,331	)		(3,598	)
Total non-operating income (expense), net		(4,227	)		2,933			926			1,993

Loss before income taxes		(8,799	)		(1,866	)		(3,405	)		(1,605	)
Provision for income taxes		35			41			55			111

Net loss	$	(8,834	)	$	(1,907	)	$	(3,460	)	$	(1,716	)

Net loss per common share:
Basic	$	(0.17	)	$	(0.04	)	$	(0.06	)	$	(0.03	)
Diluted	$	(0.17	)	$	(0.10	)	$	(0.08	)	$	(0.07	)