Revenue - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2017 |
Dec. 30, 2017 |
|
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||
| Accumulated deficit | $ (174,315) | $ (177,145) | |
| Deferred revenue, revenue recognized | 12,400 | ||
| Capitalized contract cost | 300 | ||
| Capitalized contract cost, amortization | $ 0 | ||
| Accounting Standards Update 2014-09 | |||
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||
| Accumulated deficit | $ 100 | ||
| Customer Contracts | |||
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||
| Weighted-Average Remaining Life (Years) | 5 years | ||
| Payment Solutions | |||
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||
| Remaining performance obligation, expected timing of satisfaction, period | 2 years 6 months |