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Revenue from Contracts with Customers (Tables) | 9 Months Ended
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Sep. 30, 2019
Revenue from Contract with Customer [Abstract] |
Schedule of Contract Assets and Contract Liabilities | The changes in our contract liabilities are as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Beginning of period balance | $ | 10,980 |  |  | $ | 11,971 |  |  | $ | 11,176 |  |  | $ | 12,678 |
Revenue deferred in period | 542 |  |  | 1,225 |  |  | 3,013 |  |  | 2,706 |
Revenue recognized from amounts included in contract liabilities | (1,499 | ) |  | (1,322 | ) |  | (4,166 | ) |  | (3,510 | )
End of period balance | $ | 10,023 |  |  | $ | 11,874 |  |  | $ | 10,023 |  |  | $ | 11,874 |
The changes in our contract assets are as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Beginning of period balance | $ | 3,849 |  |  | $ | 2,879 |  |  | $ | 2,881 |  |  | $ | — |
Commission costs and upfront payments to a customer capitalized in period | 333 |  |  | 489 |  |  | 2,438 |  |  | 4,344 |
Amortization of contract assets | (613 | ) |  | (490 | ) |  | (1,750 | ) |  | (1,466 | )
End of period balance | $ | 3,569 |  |  | $ | 2,878 |  |  | $ | 3,569 |  |  | $ | 2,878 |

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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- References No definition available. + Details
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