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Employee Benefit Plans (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Pension plans for Swedish employees [Member] |  |  |
Employee Benefit Plans (Textual) |  |  |
Defined benefit plan contribution, Amount | $ 306,000 | $ 249,000 | $ 184,000
Pension plans for Swedish employees [Member] | Minimum [Member] |  |  |
Employee Benefit Plans (Textual) |  |  |
Defined benefit plan contribution, Percentage | 5.00% | 5.00% | 5.00%
Pension plans for Swedish employees [Member] | Maximum [Member] |  |  |
Employee Benefit Plans (Textual) |  |  |
Defined benefit plan contribution, Percentage | 15.00% | 15.00% | 15.00%
U.S. Employee 401K Pension Plan [Member] |  |  |
Employee Benefit Plans (Textual) |  |  |
Defined benefit plan contribution, Amount | $ 89,000 | $ 81,000 | $ 66,000
Matching contributions by employer | 6.00% | 6.00% | 6.00%
Pension Plans for Taiwan Employees [Member] |  |  |
Employee Benefit Plans (Textual) |  |  |
Defined benefit plan contribution, Amount | $ 10,000 |  |
Defined benefit plan contribution, Percentage | 6.00% |  |

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