Quarterly report pursuant to Section 13 or 15(d)

Transportation and Distribution Revenue

Transportation and Distribution Revenue
3 Months Ended
Mar. 31, 2019
Revenue from Contract with Customer [Abstract]  
Transportation and Distribution Revenue
The Company's contracts related to transportation and distribution revenue are primarily comprised of a mix of natural gas supply, transportation and distribution performance obligations, as well as limited performance obligations related to system maintenance and expansion. Based on the nature of the agreements, revenue for all but one of the Company's natural gas supply, transportation and distribution performance obligations is recognized on a right to invoice basis as the performance obligations are met, which represents what the Company expects to receive in consideration and is representative of value delivered to the customer. System maintenance and expansion contracts are specific and tailored to the customer's needs, have no alternative use and have an enforceable right to payment as the services are provided. Revenue is recognized on an input method, based on the actual cost of a service as a measure of the performance obligation satisfaction. Differences between amounts invoiced and revenue recognized under the input method are reflected as an asset or liability on the Consolidated Balance Sheets.
The Company has a contract with Spire that has fixed pricing which varies over the contract term. For this specific contract, the transaction price has been allocated ratably over the contractual performance obligation. Based on a downward revision of the rate during the Company's long-term natural gas transportation contract with Spire, ASC 606 requires the Company to record the contractual transaction price, and therefore aggregate revenue, from the contract ratably over the term of the contract. Following the November 2018 rate decline, recognized performance obligations exceeded amounts invoiced and the contract liability began to decline at a rate of approximately $138 thousand per quarter and will continue to decline at the same rate through the end of the contract in October 2030. As of March 31, 2019, the revenue allocated to the remaining performance obligation under this contract is approximately $62.1 million.
The table below summarizes the Company's contract asset and contract liability balances related to its transportation and distribution revenue contracts as of March 31, 2019:
Contract Asset(1)
Contract Liability(2)
Beginning Balance January 1, 2019


Unrecognized Performance Obligations

Recognized Performance Obligations

Ending Balance March 31, 2019


(1) The contract asset balance is included in prepaid expenses and other assets in the Consolidated Balance Sheets.
(2) The contract liability balance is included in unearned revenue in the Consolidated Balance Sheets.

The following is a breakout of the Company's transportation and distribution revenue for the three months ended March 31, 2019 and 2018:
For the Three Months Ended
March 31, 2019
March 31, 2018
Natural gas transportation contracts
Natural gas distribution contracts