Selected Quarterly Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Results

The following table sets forth certain quarterly financial data for the periods indicated (in thousands, except per share data):

	Quarter Ended
	March 31, 2014			June 30, 2014			September 30, 2014			December 31, 2014
Revenue	$	20,690		$	13,885		$	1,822		$	2,547
Gross profit		19,964			13,198			1,359			(516	)
Income (loss) from operations		713			(2,041	)		(19,059	)		(18,353	)
Net loss		(4,644	)		(6,671	)		(25,256	)		(17,647	)
Basic loss per share		(0.11	)		(0.14	)		(0.51	)		(0.36	)
Diluted loss per share		(0.11	)		(0.14	)		(0.51	)		(0.36	)
	Quarter Ended
	March 31, 2013			June 30, 2013			September 30, 2013			December 31, 2013
Revenue	$	1,622		$	2,764		$	2,997		$	3,973
Gross profit		1,247			2,074			2,354			3,599
Loss from operations		(13,712	)		(13,808	)		(17,083	)		(11,799	)
Net loss		(12,723	)		(13,415	)		(18,486	)		(12,770	)
Basic loss per share		(0.34	)		(0.35	)		(0.49	)		(0.33	)
Diluted loss per share		(0.34	)		(0.35	)		(0.49	)		(0.33	)