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Fair Value Measurement (Tables) | 6 Months Ended
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Jun. 30, 2019
Fair Value Disclosures [Abstract] |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] | The following table provides a reconciliation of the Level 3 earn-out liability measured at estimated fair value as of December 31, 2018 to June 30, 2019 (in thousands):
|  | Earn-out Liability
Accrued balance, January 1, 2019 |  | $ | 47,400 |
Change in fair value of earn-out (included in income from operations as a separate line item) |  | (47,200 | )
Accrued balance, June 30, 2019 |  | $ | 200 |
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] | The following table provides quantitative information about Level 3 inputs for fair value measurement of our earn-out liability as of December 31, 2018 and June 30, 2019. Significant increases or decreases in these inputs in isolation could result in a significant impact on our fair value measurement:
Simulation Input |  | As of June 30, 2019 |  | As of December 31, 2018
Adjusted EBITDA Volatility |  | 30.00 | % |  | 30.00 | %
WACC |  | 8.25 | % |  | 8.25 | %
20-year risk free rate |  | 2.31 | % |  | 2.87 | %
Market price of risk |  | 5.77 | % |  | 5.24 | %
Cost of debt |  | 4.13 | % |  | 5.25 | %
Fair Value, Assets Measured on Recurring Basis [Table Text Block] | Our assets and liabilities measured at fair value on a recurring basis consisted of the following (Level 1, 2 and 3 inputs as defined above) (in thousands):
| Fair value measurements at June 30, 2019
| Total carrying value |  | Quoted prices in active markets for identical assets (level 1) |  | Significant other observable inputs (level 2) |  | Significant unobservable inputs (level 3)
Assets: |  |  |  |  |  |  |
Available for sale securities: |  |  |  |  |  |  |
Short-term | $ | 21,863 |  |  | $ | — |  |  | $ | 21,863 |  |  | $ | — |
Long-term | 2,017 |  |  | — |  |  | 2,017 |  |  | — |
Foreign exchange forwards: |  |  |  |  |  |  |
Prepaid expenses and other current assets | 1,511 |  |  | — |  |  | 1,511 |  |  | — |
Other assets | 560 |  |  | — |  |  | 560 |  |  | — |
Total Assets | $ | 25,951 |  |  | $ | — |  |  | $ | 25,951 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |
Earn-out liability | $ | 200 |  |  | $ | — |  |  | $ | — |  |  | $ | 200 |
Total Liabilities | $ | 200 |  |  | $ | — |  |  | $ | — |  |  | $ | 200 |
| Fair value measurements at December 31, 2018
| Total carrying value |  | Quoted prices in active markets for identical assets (level 1) |  | Significant other observable inputs (level 2) |  | Significant unobservable inputs (level 3)
Assets: |  |  |  |  |  |  |
Available for sale securities: |  |  |  |  |  |  |
Short-term | $ | 37,329 |  |  | $ | — |  |  | $ | 37,329 |  |  | $ | — |
Long-term | 2,025 |  |  | — |  |  | 2,025 |  |  | — |
Foreign exchange forwards: |  |  |  |  |  |  |
Prepaid expenses and other current assets | 187 |  |  | — |  |  | 187 |  |  | — |
Other assets | 545 |  |  | — |  |  | 545 |  |  | — |
Total Assets | $ | 40,086 |  |  | $ | — |  |  | $ | 40,086 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |
Earn-out liability | $ | 47,400 |  |  | $ | — |  |  | $ | — |  |  | $ | 47,400 |
Total Liabilities | $ | 47,400 |  |  | $ | — |  |  | $ | — |  |  | $ | 47,400 |

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19279-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19190-110258 + Details
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