Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Net sales	$ 23,130,000	$ 21,513,000	$ 45,687,000	$ 42,911,000
Cost of goods sold	10,515,000	8,771,000	20,925,000	17,324,000
Gross profit	12,615,000	12,742,000	24,762,000	25,587,000
Operating expenses:
Sales and marketing	10,005,000	13,664,000	20,157,000	29,252,000
Research and development	2,387,000	2,959,000	5,095,000	6,103,000
General and administrative	7,334,000	12,057,000	17,185,000	22,265,000
Total operating expenses	19,726,000	28,680,000	42,437,000	57,620,000
Loss from operations	(7,111,000)	(15,938,000)	(17,675,000)	(32,033,000)
Other (expense) income, net:
Interest income	184,000	15,000	290,000	17,000
Interest expense	(2,506,000)	(2,323,000)	(4,883,000)	4,220,000
Other (expense) income, net	(44,000)	0	(101,000)	5,000
Total other (expense) income, net	(2,366,000)	(2,308,000)	(4,694,000)	(4,198,000)
Loss from continuing operations before income taxes	(9,477,000)	(18,246,000)	(22,369,000)	(36,231,000)
Income tax expense	0	0	0	0
Loss from continuing operations	(9,477,000)	(18,246,000)	(22,369,000)	(36,231,000)
Loss from discontinued operations, net of income taxes	0	(58,000)	0	(114,000)
Net loss	$ (9,477,000)	$ (18,304,000)	$ (22,369,000)	$ (36,345,000)
Basic net loss per common share
Continuing operations	$ (0.85)	$ (2.91)	$ (1.93)	$ (5.80)
Discontinued operations	0	(0.01)	0	(0.02)
Basic net loss per share	(0.85)	(2.92)	(1.93)	(5.82)
Diluted net loss per common share
Continuing operations	(0.85)	(2.91)	(1.93)	(5.80)
Discontinued operations	0	(0.01)	0	(0.02)
Diluted net loss per share	$ (0.85)	$ (2.92)	$ (1.93)	$ (5.82)
Weighted average outstanding common shares used for net loss per common share:
Basic	11,205,000	6,264,954	11,589,311	6,249,356
Diluted	11,205,000	6,264,954	11,589,311	6,249,356