Leases - Narrative (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) student	Sep. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Variable lease payments			$ 0
Lease expense	$ 700,000	$ 600,000	2,200,000	$ 1,900,000
Cash paid for amounts included in operating lease liabilities	$ 700,000	$ 600,000	$ 2,200,000	$ 1,800,000
Hondros College of Nursing Segment
Segment Reporting Information [Line Items]
Number of campuses | student			6