4 . PROPERTY AND EQUIPMENT Property and equipment are comprised of the following: December  31 , 2003 2004 (U.S. dollars in thousands) Furniture and fi xtures  $  38 , 632 $  41 , 121 Computers and equipment 78 , 266 84 , 598 Leasehold improvements 36 , 123 41 , 121 BioPhotonic Scanners 9 , 378 28 , 327 Vehicles 2 , 580 3 , 021 164 , 979 198 , 188 Less: Accumulated depreciation ( 104 , 451 ) ( 121 , 677 ) $  60 , 528 $  76 , 511 Depreciation of property and equipment totaled $ 17 . 2  million, $ 18 . 3  million and $ 22 . 5  million for the years ended  December  31 ,  2002 ,  2003  and  2004 , respectively, which includes amortization expense relating to the BioPhotonic  Scanners of approximately $ 1 . 0  million and $ 4 . 9  million for the years ended December  31 ,  2003  and  2004 , respectively. Goodwill and other intangible assets consist of the following: 5 . GOODWILL AND OTHER INTANGIBLE ASSETS Carrying Amount at December  31 , Goodwill and other indefinite life intangible assets: 2003 2004 (U.S. dollars in thousands) Goodwill $  118 , 768 $  112,446 Trademarks and trade names 22 , 840 24 , 599 Marketing rights 12 , 266 — Distributor network 4 , 081 — $  157 , 955 $  137,045 December  31 ,  2003 December  31 ,  2004 Other finite life intangible assets: Gross  Carrying  Amount Accumulated  Amortization Gross  Carrying  Amount Accumulated  Amortization Weighted- average  Amortization  Period (U.S. dollars in thousands) Developed technology $  22 , 500 $  7 , 666 $  22 , 500 $  8 , 490 20 years Distributor network — — 11,598 5,576 15 years Trademarks — — 12,203 5,640 15 years Other 27 , 201 13 , 650 44,668 16 , 857 12 years $  49 , 701 $  21 , 316 $  90,969 $  36 , 563 15 years Amortization of finite-life intangible assets totaled $ 4 . 4  million, $ 4 . 1  million and $ 5 . 4  million for the years ended  December  31 ,  2002 ,  2003  and  2004 , respectively. Annual estimated amortization expense is expected to approximate $ 5 . 5 million for each of the five succeeding fiscal years. In connection with a registration statement the Company filed in October  2003 , the Staff of the Securities and Exchange  Commission commented on and sought additional support for the indefinite life designation of the Company’s trade names,  marketing rights and distributor network assets. Based on the Company’s assessment in responding to these comments, the  Company recorded the following in the second quarter of  2004 : (i) a one-time amortization charge of $ 1 . 2  million resulting  from retroactive changes in the estimates of the useful lives of certain intangible assets, which included the assignment of  useful lives to the Company’s distributor network and certain trademarks and trade names that were previously designated  61