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INTANGIBLE ASSETS, NET | 12 Months Ended
--- | ---
Dec. 31, 2012
INTANGIBLE ASSETS, NET |
INTANGIBLE ASSETS, NET | 7. INTANGIBLE ASSETS, NET The following summarizes the Company's intangible assets:
As of December 31, 2012 |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |
--- | --- | --- | --- | --- | --- | --- | ---
|  | $ |  | $ |  | $ |
Technical know-how |  |  | 1,025,861 |  |  | (341,954 | ) |  | 683,907 |
Computer software |  |  | 5,634,986 |  |  | (1,991,289 | ) |  | 3,643,697 |
Total intangible assets, net |  |  | 6,660,847 |  |  | (2,333,243 | ) |  | 4,327,604 |
As of December 31, 2011 |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |
--- | --- | --- | --- | --- | --- | --- | ---
|  | $ |  | $ |  | $ |
Acquired power purchase agreements |  |  | 4,111,199 |  |  | (142,969 | ) |  | 3,968,230 |
Technical know-how |  |  | 1,023,354 |  |  | (213,199 | ) |  | 810,155 |
Computer software |  |  | 4,982,833 |  |  | (1,244,984 | ) |  | 3,727,849 |
Total intangible assets, net |  |  | 10,117,386 |  |  | (1,601,152 | ) |  | 8,516,234 |
Amortization expense for the years ended December 31, 2010, 2011 and 2012 were $320,146, $1,012,624 and $754,148, respectively. Amortization expenses of the above intangible assets is expected to be approximately $0.9 million, $0.9 million, $0.8 million, $0.6million and $0.3 million for the years ended December 31, 2013, 2014, 2015, 2016 and 2017, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 44, 45, 46 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16373-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16265-109275 + Details
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