Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Total Revenue	$ 154,747	$ 88,541
Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	141,252	86,183
Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	335	373
Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	11,957	1,631
Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	1,203	354
Corporate and Other
Disaggregation of Revenue [Line Items]
Total Revenue	3,017	(67)
Corporate and Other | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	3,017	(67)
Corporate and Other | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0
Corporate and Other | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	0	0
Corporate and Other | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0
APUS | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	73,090	77,476
APUS | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	72,585	76,885
APUS | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	335	373
APUS | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	0	0
APUS | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	170	218
RU | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	67,099	0
RU | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	55,917	0
RU | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0
RU | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	10,294	0
RU | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	888	0
HCN | Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenue	11,541	11,132
HCN | Operating Segments | Instructional services, net of grants and scholarships
Disaggregation of Revenue [Line Items]
Total Revenue	9,733	9,365
HCN | Operating Segments | Graduation fees
Disaggregation of Revenue [Line Items]
Total Revenue	0	0
HCN | Operating Segments | Textbook and other course materials
Disaggregation of Revenue [Line Items]
Total Revenue	1,663	1,631
HCN | Operating Segments | Other fees
Disaggregation of Revenue [Line Items]
Total Revenue	$ 145	$ 136