CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE (LOSS) INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
NET REVENUES	$ 22,813	$ 17,418
COST OF SALES	3,028	2,391
Gross margin	19,785	15,027
OPERATING EXPENSES
Research and development	5,908	2,913
Selling, general and administrative	18,161	11,078
Total operating expenses	24,069	13,991
Operating (loss) income	(4,284)	1,036
Interest income	4	298
Interest expense	0	(764)
(Loss) income before income taxes	(4,280)	570
Income tax expense	0	0
Net (loss) income and comprehensive (loss) income	(4,280)	570
Net (loss) income and comprehensive (loss) income	$ (4,280)	$ 570
(Loss) earnings per share:
Basic (in dollars per share)	$ (0.17)	$ 0.03
Diluted (in dollars per share)	$ (0.17)	$ 0.03
Weighted-average shares outstanding:
Basic (in shares)	24,912	17,372
Diluted (in shares)	24,912	18,734