Share-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Stock-based Compensation
Share-based compensation expense	$ 33	$ 24	$ 80	$ 89
Cost of goods sold [Member]
Stock-based Compensation
Share-based compensation expense	2	2	5	6
Sales and marketing [Member]
Stock-based Compensation
Share-based compensation expense	2	2	6	9
Research and product development [Member]
Stock-based Compensation
Share-based compensation expense	17	10	37	34
General and administrative [Member]
Stock-based Compensation
Share-based compensation expense	$ 12	$ 10	$ 32	$ 40