Share-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock-based Compensation
Share-based compensation expense	$ 24	$ 30	$ 47	$ 65
Cost of goods sold [Member]
Stock-based Compensation
Share-based compensation expense	1	2	3	4
Sales and marketing [Member]
Stock-based Compensation
Share-based compensation expense	2	3	4	7
Research and product development [Member]
Stock-based Compensation
Share-based compensation expense	11	11	20	24
General and administrative [Member]
Stock-based Compensation
Share-based compensation expense	$ 10	$ 14	$ 20	$ 30