Goodwill and Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 40,826	$ 40,826
Accumulated Amortization	29,257	25,313
Net Carrying Amount	11,569	15,513
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	54,721	54,721
Impairment	15,500	15,500
Gross/net carrying amount	39,221	39,221
Total intangible assets, Gross	95,547	95,547
Total intangible assets, Impairment	15,500	15,500
Total intangible assets, net	50,790	54,734
Trade name
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	28,498	28,498
Gross/net carrying amount	28,498	28,498
Accreditation, licensing, and Title IV
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	26,186	26,186
Impairment	15,500	15,500
Gross/net carrying amount	10,686	10,686
Affiliation agreements
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	37	37
Gross/net carrying amount	37	37
Student roster
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	20,000	20,000
Accumulated Amortization	15,833	13,333
Net Carrying Amount	4,167	6,667
Curricula
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	14,563	14,563
Accumulated Amortization	7,860	6,680
Net Carrying Amount	6,703	7,883
Student and customer contracts and relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	4,614	4,614
Accumulated Amortization	4,242	4,168
Net Carrying Amount	372	446
Lead conversions
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,500	1,500
Accumulated Amortization	1,187	1,000
Net Carrying Amount	313	500
Non-compete agreements
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	86	86
Accumulated Amortization	86	86
Net Carrying Amount	0	0
Tradename
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	35	35
Accumulated Amortization	35	35
Net Carrying Amount	0	0
Accreditation and licenses
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	28	28
Accumulated Amortization	14	11
Net Carrying Amount	$ 14	$ 17