Summary of Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Selected Quarterly Financial Information [Abstract]

Summary of Quarterly Financial Information (Unaudited)

	Quarter Ended
2019	March 31			June 30			September 30			December 31
	(in thousands, except share data)
Net sales	$	17,552		$	20,525		$	22,412		$	23,210
Gross profit		11,078			12,712			12,658			14,239
Net loss		(26,484	)		(37,654	)		(22,433	)		(20,247	)
Net loss per share:
Basic and diluted	$	(0.91	)	$	(1.10	)	$	(0.45	)	$	(0.41	)

	Quarter Ended
2018	March 31			June 30			September 30			December 31
	(in thousands, except share data)
Net sales	$	14,676		$	17,554		$	16,875		$	19,021
Gross profit		8,579			10,894			10,477			11,354
Net loss		(19,423	)		(18,028	)		(20,545	)		(24,631	)
Net loss per share:
Basic and diluted	$	(0.99	)	$	(0.73	)	$	(0.72	)	$	(0.86	)