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Intangible Assets, net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items] |  |  |
Beginning balance |  | $ 18,068 | $ 0
Assets Acquired Pursuant to Business Combination | $ 0 | 19,970 |
Impairment Charges | 8,500 | 900 |
Amortization of intangible assets | 1,398 | 1,002 | 0
Ending balance | 9,046 | 18,068 |
Gross Carrying Amount | 10,570 | 19,070 |
Accumulated Amortization | (1,524) | (1,002) |
Developed technology |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Beginning balance |  | 17,956 | 0
Assets Acquired Pursuant to Business Combination | 0 | 18,800 |
Impairment Charges | 8,500 | 0 |
Amortization of intangible assets | 410 | 844 |
Ending balance | 9,046 | 17,956 |
Gross Carrying Amount | 10,300 | 18,800 |
Accumulated Amortization | (1,254) | (844) |
Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Beginning balance |  | 112 | 0
Assets Acquired Pursuant to Business Combination | 0 | 270 |
Impairment Charges | 0 | 0 |
Amortization of intangible assets | 112 | 158 |
Ending balance | 0 | 112 |
Gross Carrying Amount | 270 | 270 |
Accumulated Amortization | (270) | (158) |
Trade name |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Beginning balance |  |  | $ 0
Assets Acquired Pursuant to Business Combination |  | 900 |
Impairment Charges |  | 900 |
Amortization of intangible assets |  | 0 |
Ending balance |  | $ 0 |
us-gaap_DisclosureTotal |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Amortization of intangible assets | $ 522 |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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