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Current Vulnerability Due to Certain Concentrations (Tables) | 12 Months Ended
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Dec. 31, 2018
Geographic Concentration [Member] |
Concentration Risk [Line Items] |
Current Vulnerability Due to Certain Concentrations | As of December 31, 2018 the Company's cash and cash equivalents and short-term investments were concentrated in the following countries:
Germany |  |  | 20.6 | %
Singapore |  |  | 20.4 | %
Israel |  |  | 16.4 | %
United States |  |  | 14.9 | %
The Republic of China (Taiwan) |  |  | 11.0 | %
People's Republic of China |  |  | 9.9 | %
Other Asia |  |  | 3.0 | %
Other Europe |  |  | 2.4 | %
Other |  |  | 1.4 | %
Credit Concentration Risk [Member] |
Concentration Risk [Line Items] |
Current Vulnerability Due to Certain Concentrations | The Company maintains cash and cash equivalents and short-term investments with various major financial institutions. The Company is exposed to credit risk related to the potential inability to access liquidity in financial institutions where its cash and cash equivalents and short-term investments are concentrated. As of December 31, 2018, the following financial institutions held over 10% of the Company's combined cash and cash equivalents and short-term investments balance:
MUFG Bank Ltd. |  |  | 18.5 | %
JPMorgan* |  |  | 11.7 | %
HSBC* |  |  | 12.5 | %
*Participant in Credit Facility

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