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Revenue Recognition - Additional Information (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2020
segment
Dec. 31, 2019
USD ($)
item
segment
Graduation Fund [Line Items]    
Number of Reportable Segments | segment 2 2
Number of free courses   1
Number of successfully completed courses   3
Consecutive terms of non attendance in which Graduation Fund credits will be lost   1
Expected collection period of tuition receivable   12 months
Unbilled receivables | $   $ 1.3
Current Liability    
Graduation Fund [Line Items]    
Graduation fund estimated to be redeemed | $   $ 19.6
Minimum    
Graduation Fund [Line Items]    
Expected collection period of tuition receivable, noncurrent   2 years
Maximum    
Graduation Fund [Line Items]    
Expected collection period of tuition receivable, noncurrent   4 years