Selected Quarterly Results (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

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, 2018			June 30, 2018			September 30, 2018			December 31, 2018
Revenue	$	11,281		$	12,175		$	14,156		$	18,028
Gross profit		7,866			7,609			10,377			14,005
Loss from operations		(8,123	)		(7,266	)		(3,811	)		(4,448	)
Net loss		(10,709	)		(9,770	)		(18,880	)		(7,008	)
Basic loss per share		(0.18	)		(0.16	)		(0.29	)		(0.13	)
Diluted loss per share		(0.18	)		(016	)		(0.29	)		(0.13	)

	Quarter Ended
	March 31, 2017		June 30, 2017			September 30, 2017			December 31, 2017
Revenue	$	29,478	$	8,744		$	11,253		$	12,510
Gross profit		23,833		4,573			6,808			7,275
Income (loss) from operations		7,903		(12,987	)		(10,045	)		(14,291	)
Net income (loss)		48,325		(14,879	)		(11,951	)		(16,210	)
Basic income (loss) per share		0.89		(0.27	)		(0.21	)		(0.31	)
Diluted income (loss) per share		0.87		(0.27	)		(0.21	)		(0.30	)

	Quarter Ended
	March 31, 2016			June 30, 2016			September 30, 2016			December 31, 2016
Revenue	$	3,040		$	5,004		$	3,571		$	3,931
Gross profit		490			910			1,257			1,631
Loss from operations		(17,942	)		(15,594	)		(15,199	)		(15,200	)
Net loss		(18,733	)		(16,486	)		(15,977	)		(15,942	)
Basic loss per share		(0.35	)		(0.31	)		(0.30	)		(0.29	)
Diluted loss per share		(0.35	)		(0.31	)		(0.30	)		(0.29	)