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Property Plant and Equipment Net - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  |  | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended |  | 6 Months Ended
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Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 Buildings | Dec. 31, 2011 Buildings | Jun. 30, 2012 Buildings Minimum | Jun. 30, 2012 Buildings Maximum | Jun. 30, 2012 Property Plant and Equipment | Jun. 30, 2011 Property Plant and Equipment | Jun. 30, 2012 Property Plant and Equipment | Jun. 30, 2011 Property Plant and Equipment | Jun. 30, 2012 Property Plant and Equipment Cost of net revenue | Jun. 30, 2011 Property Plant and Equipment Cost of net revenue | Jun. 30, 2012 Property Plant and Equipment Cost of net revenue | Jun. 30, 2011 Property Plant and Equipment Cost of net revenue | Jun. 30, 2012 Property Plant and Equipment Administrative expense | Jun. 30, 2011 Property Plant and Equipment Administrative expense | Jun. 30, 2012 Property Plant and Equipment Administrative expense | Jun. 30, 2011 Property Plant and Equipment Administrative expense | Jun. 30, 2012 Extraction Wells, Transmission Channels and Ducts Second phase enhancement project | Jun. 30, 2012 Extraction Wells, Transmission Channels and Ducts Second phase enhancement project Extraction wells | Jun. 30, 2012 Extraction Wells, Transmission Channels and Ducts Second phase enhancement project Protective shells to transmission channels and ducts | Jun. 30, 2012 Extraction Wells, Transmission Channels and Ducts Second phase enhancement project Protective shells to transmission channels and ducts Minimum | Jun. 30, 2012 Extraction Wells, Transmission Channels and Ducts Second phase enhancement project Protective shells to transmission channels and ducts Maximum
Property, Plant and Equipment [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate carrying value of buildings and salt pans with no property ownership certificates |  |  |  |  | $ 30,316,834 | $ 33,108,012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization expense | 5,607,425 | 4,120,097 | 11,290,588 | 7,468,616 |  |  |  |  | 5,521,178 | 4,027,143 | 11,118,099 | 7,375,662 | 5,403,370 | 3,830,437 | 10,645,703 | 6,805,179 | 117,808 | 196,707 | 472,396 | 570,483 |  |  |  |  |
Total construction cost of factory |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,806,910 | 8,139,503 |  |
Estimated useful life (in years) |  |  |  |  |  |  | 8 years | 20 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years | 8 years
Net book value protective shells for transmission channels and ducts, written off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 911,995 |  |  |  |
Repair and maintenance expense | $ 0 | $ 38,457 | $ 127 | $ 89,090 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The aggregate costs related to construction and development services during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 5 -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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