Stockholders' Equity - Summary of Stock-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total stock-based compensation expense	$ 7,668	$ 7,740	$ 8,009
Instructional costs and services
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total stock-based compensation expense	808	895	1,254
Selling and promotional
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total stock-based compensation expense	562	490	823
General and administrative
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Total stock-based compensation expense	$ 6,298	$ 6,355	$ 5,932