CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
NET REVENUES	$ 22,758	$ 12,715	$ 45,571	$ 30,133
OPERATING EXPENSES AND OTHER OPERATING INCOME
Cost of sales (exclusive of amortization of acquired intangible asset)	3,697	2,146	6,725	4,537
Research and development	6,793	2,704	12,701	5,617
Selling, general and administrative	20,822	10,392	38,983	21,470
Amortization of acquired intangible asset	256	0	256	0
Other operating income	0	(1,882)	0	(1,882)
Total operating expenses, net	31,568	13,360	58,665	29,742
Operating (loss) income	(8,810)	(645)	(13,094)	391
Interest income	24	38	28	336
Interest expense	0	(769)	0	(1,533)
Loss before income taxes	(8,786)	(1,376)	(13,066)	(806)
Income tax expense	5	0	5	0
Net loss and comprehensive loss	(8,791)	(1,376)	(13,071)	(806)
Net loss and comprehensive loss	$ (8,791)	$ (1,376)	$ (13,071)	$ (806)
Loss per share:
Basic (in dollars per share)	$ (0.35)	$ (0.08)	$ (0.52)	$ (0.05)
Diluted (in dollars per share)	$ (0.35)	$ (0.08)	$ (0.52)	$ (0.05)
Weighted-average shares outstanding:
Basic (in shares)	25,091	17,544	25,002	17,458
Diluted (in shares)	25,091	17,544	25,002	17,458