Unaudited Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Total product, rental, and service revenue	$ 23,941,000	$ 18,433,000
Costs and operating expenses:
General and administrative	11,501,000	10,397,000
Sales and marketing	2,597,000	2,376,000
Research and development	2,204,000	2,075,000
Intangible asset amortization	702,000	688,000
Total operating expenses	25,159,000	21,728,000
Operating loss	(1,218,000)	(3,295,000)
Other income:
Interest income (expense), net	681,000	(140,000)
Other income	103,000	253,000
Total other income, net	784,000	113,000
Loss before income tax expense	(434,000)	(3,182,000)
Income tax expense	(14,000.0)	(17,000)
Net loss from continuing operations	(448,000)	(3,199,000)
Discontinued operations:
Loss from discontinued operations before income tax expense	0	(6,908,000)
Income tax expense	0	(114,000)
Loss from discontinued operations	0	(7,022,000)
Net loss	(448,000)	(10,221,000)
Loss from continuing operations, attributable to common shareholders:
Basic	(448,000)	(3,199,000)
Diluted	(448,000)	(3,199,000)
Loss from discontinued operations, attributable to common shareholders:
Basic	0	(7,022,000)
Diluted	$ 0	$ (7,022,000)
Loss per share from continuing operations, attributable to common shareholders:
Basic (in dollars per share)	$ (0.01)	$ (0.07)
Diluted (in dollars per share)	(0.01)	(0.07)
Loss per share from discontinued operations, attributable to common shareholders:
Basic (in dollars per share)	0	(0.15)
Diluted (in dollars per share)	$ 0	$ (0.15)
Net loss attributable to common shareholders:
Basic	$ (448,000)	$ (10,221,000)
Diluted	$ (448,000)	$ (10,221,000)
Net loss per share attributable to common shareholders:
Basic (in dollars per share)	$ (0.01)	$ (0.22)
Diluted (in dollars per share)	$ (0.01)	$ (0.22)
Weighted average shares used to compute loss per share attributable to common shareholders:
Basic (in shares)	47,134,720	45,432,426
Diluted (in shares)	47,134,720	45,432,426
Product revenue
Total product, rental, and service revenue	$ 22,299,000	$ 16,743,000
Costs and operating expenses:
Cost of goods and services sold (exclusive of intangible assets amortization)	7,109,000	5,136,000
Service revenue
Total product, rental, and service revenue	60,000	25,000
Costs and operating expenses:
Cost of goods and services sold (exclusive of intangible assets amortization)	10,000	0
Rental revenue
Total product, rental, and service revenue	1,582,000	1,665,000
Costs and operating expenses:
Cost of goods and services sold (exclusive of intangible assets amortization)	$ 1,036,000	$ 1,056,000