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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Summary of Significant Accounting Policies [Abstract] |
Components of inventories | Inventories consist of the following (U.S. dollars in thousands):
|  | December 31, |
|  | 2012 |  |  | 2013 |
Raw materials |  | $ | 32,332 |  |  | $ | 117,982 |
Finished goods |  |  | 103,542 |  |  |  | 221,687 |
|  | $ | 135,874 |  |  | $ | 339,669 |
Property and equipment
Schedule of property and equipment estimated useful lives | Property and equipment are recorded at cost and depreciated using the straight-line method over the following estimated useful lives:
Buildings |  | 39 years
Furniture and fixtures |  | 5 - 7 years
Computers and equipment |  | 3 - 5 years
Leasehold improvements |  | Shorter of estimated useful life or lease term
Scanners |  | 3 years
Vehicles |  | 3 - 5 years
Reconciliation of unrecognized tax benefits |
|  | 2011 |  |  | 2012 |  |  | 2013 |
Gross balance at January 1 |  | $ | 14,821 |  |  | $ | 7,387 |  |  | $ | 9,045 |
Decreases related to prior year tax positions |  |  | (7,138 | ) |  |  | - |  |  |  | - |
Increases related to current year tax positions |  |  | 1,415 |  |  |  | 2,430 |  |  |  | 1,188 |
Settlements |  |  | (499 | ) |  |  | - |  |  |  | (1,671 | )
Decreases due to lapse of statutes of limitations |  |  | (1,255 | ) |  |  | (854 | ) |  |  | (1,086 | )
Currency adjustments |  |  | 43 |  |  |  | 82 |  |  |  | 8 |
Gross balance at December 31 |  | $ | 7,387 |  |  | $ | 9,045 |  |  | $ | 7,484 |

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- Definition Tabular disclosure of the estimated useful lives of property and equipment by category. + References No definition available. + Details
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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 2 -Paragraph 6 -Subparagraph a,b,c -Article 5 + Details
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- Definition Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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