Stock-based Compensation - Stock-Based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Stock-based Compensation
Total stock-based compensation expense	$ 301	$ 581
Research and development expense
Stock-based Compensation
Total stock-based compensation expense	117	289
Sales and marketing expense
Stock-based Compensation
Total stock-based compensation expense	18	40
General and administrative expense
Stock-based Compensation
Total stock-based compensation expense	166	$ 252
Stock options and RSUs
Stock-based Compensation
Unrecognized stock-based compensation expense	$ 0