Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Data

The following table is in thousands, except per share amounts:

Quarter Ended	March 31		June 30		September 30		December 31
2020
Product revenue, net	$	93,247	$	88,565	$	86,327	$	85,735
Gross profit on product revenue	91,369		87,331		85,111		84,481
Net income	30,065		28,327		21,625		25,994
Basic net income per share	$	0.26	$	0.25	$	0.19	$	0.22
Diluted net income per share	$	0.25	$	0.23	$	0.17	$	0.20
2019
Product revenue, net	$	64,829	$	72,257	$	81,505	$	87,895
Gross profit on product revenue	63,589		70,880		80,054		86,459
Net income	18,274		20,186		26,340		29,381
Basic net income per share	$	0.16	$	0.18	$	0.23	$	0.26
Diluted net income per share	$	0.15	$	0.17	$	0.22	$	0.24