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Capitalized Software Costs - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Impairment losses |  |  | $ 2,175,000 | $ 5,000
Software and Software Development Costs |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Capitalized software costs, additions | $ 128,000 | $ 24,000 | 176,000 | 58,000
Amortization | 86,000 | 163,000 | 217,000 | 320,000
Impairment losses | $ 0 | $ 0 | $ 0 | $ 0
Minimum | Software and Software Development Costs |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Capitalized software costs, useful life |  |  | 3 years |
Maximum | Software and Software Development Costs |  |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |  |
Capitalized software costs, useful life |  |  | 4 years |

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