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Commitments and Contingencies (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 03, 2018 | Dec. 31, 2004 | Dec. 31, 2002 | Jun. 30, 2018 | Dec. 31, 2017
Operating leases |  |  |  |  |
2018 Remaining |  |  |  | $ 3,171,000 |
2019 |  |  |  | 5,613,000 |
2020 |  |  |  | 4,021,000 |
2021 |  |  |  | 3,194,000 |
2022 |  |  |  | 2,364,000 |
Thereafter |  |  |  | 3,250,000 |
Total |  |  |  | 21,613,000 |
Purchase obligations |  |  |  |  |
2018 Remaining |  |  |  | 849,000 |
2019 |  |  |  | 95,000 |
2020 |  |  |  | 12,000 |
2021 |  |  |  | 0 |
2022 |  |  |  | 0 |
Thereafter |  |  |  | 0 |
Total |  |  |  | 956,000 |
Total commitments |  |  |  |  |
Total commitments 2018 Remaining |  |  |  | 4,020,000 |
Total commitments in 2019 |  |  |  | 5,708,000 |
Total commitments in 2020 |  |  |  | 4,033,000 |
Total commitments in 2021 |  |  |  | 3,194,000 |
Total commitments in 2022 |  |  |  | 2,364,000 |
Total commitments Thereafter |  |  |  | 3,250,000 |
Total commitments |  |  |  | 22,569,000 |
Local deals and getaway merchant payables |  |  |  | $ 8,800,000 | $ 14,600,000
Travel Zoo Com Corporation |  |  |  |  |
Loss Contingencies |  |  |  |  |
Period for receiving shares under merger (in years) |  | 2 years | 2 years |  |
Number of shares exchanged under merger (in shares) |  |  | 1 |  |
Subsequent Event |  |  |  |  |
Total commitments |  |  |  |  |
Decrease to future minimum payment in remainder of year from termination of lease | $ 130,000 |  |  |  |
Decrease to future minimum payment in 2019 from termination of lease | 548,000 |  |  |  |
Decrease to future minimum payment in 2020 from termination of lease | $ 91,000 |  |  |  |

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