CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 55,336,000	$ 54,026,000
Cost of sales	32,529,000	7,111,000
Gross profit	22,807,000	46,915,000
Operating expenses:
Selling, general and administrative	50,546,000	34,925,000
Research and development	24,873,000	13,930,000
Total operating expenses	75,419,000	48,855,000
Loss from operations	(52,612,000)	(1,940,000)
Non-operating income (expense):
Interest income	696,000	788,000
Interest expense	(881,000)
Other expense, net	(1,711,000)	(68,000)
Total non-operating (expense) income	(1,896,000)	720,000
Loss before taxes	(54,508,000)	(1,220,000)
Income tax (benefit) provision	(450,000)	122,000
Net loss	$ (54,058,000)	$ (1,342,000)
Basic and diluted net loss per share (in dollar per share)	$ (1.24)	$ (0.04)
Weighted average shares used to compute basic and diluted net loss per share	43,766	36,205