v3.19.3.a.u2

Segment and Geographic Information - Trade Accounts Receivable and Contract Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Accounts receivable, net | $ 33,655 | $ 32,636
Total trade accounts receivable | 33,655 | 32,357
Contract liabilities | 48,833 | 8,345
Graduate Program Segment |  |
Segment Reporting Information [Line Items] |  |
Accounts receivable, net | 3,454 | 31,110
Unbilled revenue | 12,123 | 265
Contract liabilities | 2,210 | 2,864
Allowance for doubtful accounts | 0 | 0
Alternative Credential Segment |  |
Segment Reporting Information [Line Items] |  |
Accounts receivable, net | 12,436 | 982
Unbilled revenue | 5,642 | 0
Contract liabilities | 46,623 | 5,481
Allowance for doubtful accounts | $ 1,300 | $ 257

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