Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Sales:
Net sales	$ 132,379	$ 138,750
Costs and expenses:
Research and development	9,399	10,369
Sales, marketing and support	20,925	23,198
General and administrative	18,899	24,656
Goodwill impairment charge	5,333	0
Long-lived assets impairment charge	657	0
Total costs and expenses	149,724	144,475
Loss from operations	(17,345)	(5,725)
Interest income	3,646	1,507
Interest expense	1	3
Other (expense) income, net	(1,404)	772
Loss from continuing operations before income tax expense	(15,104)	(3,449)
Income tax expense from continuing operations	318	546
Net loss from continuing operations	(15,422)	(3,995)
Income from discontinued operations, net of tax	0	28,025
Net (loss) income	$ (15,422)	$ 24,030
Net loss from continuing operations per common share
Basic (in dollars per share)	$ (0.81)	$ (0.21)
Diluted (in dollars per share)	(0.81)	(0.21)
Net income from discontinued operations per common share
Basic (in dollars per share)	0.00	1.50
Diluted (in dollars per share)	0.00	1.50
Net (loss) income per common share
Basic (in dollars per share)	(0.81)	1.29
Diluted (in dollars per share)	$ (0.81)	$ 1.29
Weighted average number of shares outstanding:
Basic (in shares)	19,130	18,632
Diluted (in shares)	19,130	18,632
Product
Sales:
Net sales	$ 17,757	$ 26,842
Costs and expenses:
Cost of product and service sales	29,149	25,158
Service
Sales:
Net sales	114,622	111,908
Costs and expenses:
Cost of product and service sales	$ 65,362	$ 61,094