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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2018
Accounting Policies [Abstract] |
Disaggregation of Revenue | The following table shows the Company's revenue disaggregated by product or service type for the three and nine months ended September 30, 2018 and 2017:
| Three months ended September 30, |  |  |  | Nine months ended September 30, |  |
| (in thousands) |  |  |  | (in thousands) |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
Compressors - sales | $ | 2,891 |  | $ | 2,683 |  | $ | 9,454 |  | $ | 11,303
Flares - sales | 336 |  | 679 |  | 1,827 |  | 1,510
Other (Parts/Rebuilds) - sales | 720 |  | 896 |  | 2,046 |  | 2,487
Service and maintenance 1 | 5,221 |  | 4,878 |  | 15,022 |  | 14,959
Total revenue from contracts with customers | 9,168 |  | 9,136 |  | 28,349 |  | 30,259
Add: non-ASC 606 rental revenue | 7,228 |  | 6,777 |  | 20,969 |  | 20,774
Total revenue | $ | 16,396 |  | $ | 15,913 |  | $ | 49,318 |  | $ | 51,033
1Service and maintenance includes revenue from servicing our own rental equipment contracted to customers and third party equipment.
Schedule of Contract with Customer, Asset and Liability | As of September 30, 2018 and December 31, 2017, we had the following receivables and deferred income from contracts with customers:
| September 30, 2018 |  | December 31, 2017
| (in thousands) |  |
Accounts Receivable |  |  |
Accounts receivable - contracts with customers | $ | 5,313 |  | $ | 5,454
Accounts receivable - non-ASC 606 | 3,208 |  | 3,649
Total Accounts Receivable | $ | 8,521 |  | $ | 9,103
Less: Allowance for doubtful accounts | $ | (405) |  | $ | (569)
Total Accounts Receivable, net | $ | 8,116 |  | $ | 8,534
Deferred income | $ | 134 |  | $ | 185
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction | The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period:
(in thousands) | 2019(1) | 2020 | 2021 | 2022 | 2023 | Total
Service and Maintenance | $ | 559 | $ | 1,773 | $ | 1,375 | $ | 1,375 | $ | 462 | $ | 5,544
(1) For the three months starting October 2019.

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