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REVENUE RECOGNITION (Tables) | 3 Months Ended
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Mar. 31, 2019
REVENUE RECOGNITION [Abstract] |
Disaggregation Revenues | Disaggregated Revenues The following table shows the Company’s revenues disaggregated by service type; all revenues are generated within a similar geographical location:
(in thousands) |  | Three months ended March 31, 2019 |  |  | Three months ended March 31, 2018 |
Tariff Revenue |  |  |  |  |  |
Consumption charges |  | $ | 10,393 |  |  | $ | 10,796 |
Fixed fees |  |  | 6,648 |  |  |  | 6,329 |
Service charges |  |  | 177 |  |  |  | 157 |
DSIC |  |  | 888 |  |  |  | 748 |
Revenue reserved for refund – TCJA impact |  |  | (422 | ) |  |  | -748 |
Total Tariff Revenue |  | $ | 17,684 |  |  | $ | 17,282 |
Non-Tariff Revenue |  |  |  |  |  |  |  |
Service line protection plans |  | $ | 1,050 |  |  | $ | 982 |
Contract operations |  |  | 328 |  |  |  | 359 |
Inspection fees |  |  | 23 |  |  |  | 9 |
Total Non-Tariff Revenue |  | $ | 1,401 |  |  | $ | 1,350 |
Other Operating Revenue not in scope of ASC 606 |  | $ | 301 |  |  | $ | 274 |
Total Operating Revenue |  | $ | 19,386 |  |  | $ | 18,906 |
Contract Assets and Contract Liabilities | Our contract assets and liabilities consist of the following:
(in thousands) |  | March 31, 2019 |  |  | December 31, 2018 |
Accounts Receivable |  |  |  |  |  |
Accounts Receivable-Tariff |  | $ | 4,623 |  |  | $ | 5,751 |
Accounts Receivable-Non-Tariff |  |  | 285 |  |  |  | 320 |
Total Accounts Receivable |  | $ | 4,908 |  |  | $ | 6,071 |
Contract Assets – Tariff |  | $ | 2,272 |  |  | $ | 2,367 |
Deferred Revenue |  |  |  |  |  |  |  |
Deferred Revenue – Tariff |  | $ | 854 |  |  | $ | 1,025 |
Deferred Revenue – Non-Tariff |  |  | 208 |  |  |  | 227 |
Total Deferred Revenue |  | $ | 1,062 |  |  | $ | 1,252 |
Refund Liability - Tariff |  | $ | 3,772 |  |  | $ | 3,298 |

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