Leases - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) campus	Jun. 30, 2019 USD ($)
Segment Reporting Information [Line Items]
Variable lease payments			$ 0
Lease expense	$ 700,000	$ 600,000	1,500,000	$ 1,200,000
Cash paid for amounts included in operating lease liabilities	$ 700,000	$ 600,000	$ 1,400,000	$ 1,200,000
Hondros College of Nursing Segment
Segment Reporting Information [Line Items]
Number of campuses | campus			6