Goodwill and Intangible Assets - Schedule of Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	$ 40,826	$ 40,826
Accumulated Amortization	40,022	37,508
Net Carrying Amount	804	3,318
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	54,721	54,721
Impairment	26,500	26,500
Gross/net carrying amount	28,221	28,221
Total intangible assets, Gross	95,547	95,547
Total intangible assets, Impairment	26,500	26,500
Total intangible assets, net	29,025	31,539
Trade name
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	28,498	28,498
Impairment	8,000	8,000
Gross/net carrying amount	20,498	20,498
Accreditation, licensing, and Title IV
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross carrying amount, before impairment	26,186	26,186
Impairment	18,500	18,500
Gross/net carrying amount	7,686	7,686
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	20,000	20,000
Net Carrying Amount	0	0
Curricula
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	14,563	14,563
Accumulated Amortization	13,759	11,400
Net Carrying Amount	804	3,163
Student and customer contracts and relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	4,614
Accumulated Amortization	4,614
Net Carrying Amount	0
Student and customer contracts and relationships
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount		4,614
Accumulated Amortization		4,465
Net Carrying Amount		149
Lead conversions
Finite-Lived Intangible Assets, Net [Abstract]
Gross Carrying Amount	1,500	1,500
Accumulated Amortization	1,500	1,500
Net Carrying Amount	0	0
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	28	22
Net Carrying Amount	$ 0	$ 6