Segment Information - Summary of Financial Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue:
Total Revenue	$ 149,535	$ 98,248	$ 453,890	$ 264,803
Depreciation and amortization:
Total Depreciation and amortization	7,982	4,386	24,249	9,561
Income (loss) from operations before interest and income taxes:
Total (loss) income from operations before interest and income taxes	(1,026)	1,262	(137,086)	13,874
Interest income (expense):
Total Interest expense	(3,594)	(1,305)	(10,339)	(1,167)
Income tax expense (benefit):
Total Income tax (benefit) expense	(860)	224	(35,152)	3,509
Capital expenditures:
Corporate and Other	3,596	2,785	10,905	5,813
Corporate and Other
Revenue:
Total Revenue	7,843	(30)	15,187	(156)
Depreciation and amortization:
Total Depreciation and amortization	146	10	442	31
Income (loss) from operations before interest and income taxes:
Total (loss) income from operations before interest and income taxes	(4,266)	(6,012)	(19,845)	(17,444)
Interest income (expense):
Total Interest expense	(3,698)	(1,348)	(10,533)	(1,344)
Income tax expense (benefit):
Total Income tax (benefit) expense	4,814	(2,261)	(7,400)	(6,287)
Capital expenditures:
Corporate and Other	67	0	170	0
APUS Segment | Operating Segments
Revenue:
Total Revenue	68,735	65,906	211,729	210,321
Depreciation and amortization:
Total Depreciation and amortization	1,573	2,246	4,860	7,071
Income (loss) from operations before interest and income taxes:
Total (loss) income from operations before interest and income taxes	12,532	7,825	39,338	30,969
Interest income (expense):
Total Interest expense	69	41	146	171
Income tax expense (benefit):
Total Income tax (benefit) expense	(3,557)	2,606	11,628	9,673
Capital expenditures:
Corporate and Other	811	1,159	2,209	2,973
RU Segment | Operating Segments
Revenue:
Total Revenue	61,548	21,132	192,538	21,132
Depreciation and amortization:
Total Depreciation and amortization	6,015	1,935	18,254	1,935
Income (loss) from operations before interest and income taxes:
Total (loss) income from operations before interest and income taxes	(7,900)	(999)	(153,562)	(999)
Interest income (expense):
Total Interest expense	30	0	38	0
Income tax expense (benefit):
Total Income tax (benefit) expense	(2,183)	(371)	(38,564)	(371)
Capital expenditures:
Corporate and Other	1,942	1,259	6,860	1,259
HCN Segment | Operating Segments
Revenue:
Total Revenue	11,409	11,240	34,436	33,506
Depreciation and amortization:
Total Depreciation and amortization	248	195	693	524
Income (loss) from operations before interest and income taxes:
Total (loss) income from operations before interest and income taxes	(1,392)	448	(3,017)	1,348
Interest income (expense):
Total Interest expense	5	2	10	6
Income tax expense (benefit):
Total Income tax (benefit) expense	66	250	(816)	494
Capital expenditures:
Corporate and Other	$ 776	$ 367	$ 1,666	$ 1,581