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Certain Relationships and Related Party Transactions (Details) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 30, 2018 | Jan. 23, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Wipro |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Capitalized costs for internally developed software services received |  |  | $ 2,300,000 |
Accounts payable, related parties |  |  | 5,000,000 | $ 2,200,000
Accounts receivable, related parties |  |  |  | 0
Wipro | Asset impairment charge |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Capitalized costs for internally developed software services received |  |  | 2,100,000 |
Wipro | Technology Related Services |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Expenses from transactions with related party |  |  | $ 12,300,000 | $ 5,600,000
Securities Purchase Agreement | Series A Preferred Stock |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Number of shares issued (in shares) |  | 9,926 |  |
Consideration received on transaction |  | $ 9,900,000 |  |
Securities Purchase Agreement | Series A Preferred Stock | Wipro |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Number of shares issued (in shares) | 9,926 |  |  |
Shares issuable upon conversion (in shares) | 1,001,614 |  |  |
Shares issuable upon conversion (as percent) | 16.00% |  |  |
Consideration received on transaction | $ 9,900,000 |  |  |

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