v2.4.0.6

Note 9 - Statutory Reserve and Development Fund (Detail) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Statutory reserve, percentage allocation of income after tax |  |  | 10.00% |
Statutory reserve, percentage of registered capital |  |  | 50.00% |
Statutory common welfare fund, percentage |  |  | 5-10% |
Development fund, percentage |  |  | 5.00% |
Statutory reserve accounts, number |  |  | 1 |
Statutory reserve, appropriated | $ 639,217 | $ 814,343 | $ 1,467,177 | $ 1,449,408
Reserve for deveopment fund | $ 319,608 | $ 407,171 | $ 733,588 | $ 724,704

X
- Definition Percentage of income after taxes taht is allocated to the development fund. + References No definition available. + Details
Name: | deer_DevelopmentFundPercentage
Namespace Prefix: | deer_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of appropriations reserved for the development fund. + References No definition available. + Details
Name: | deer_ReserveForDeveopmentFund
Namespace Prefix: | deer_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of income after taxes that is allocated to the statutory common welfare fund. + References No definition available. + Details
Name: | deer_StatutoryCommonWelfareFundPercentage
Namespace Prefix: | deer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of statutory reserve accounts required under PRC Corporate Law. + References No definition available. + Details
Name: | deer_StatutoryReserveAccountsNumber
Namespace Prefix: | deer_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount that the Company appropriated to the statutory reserve accounts during the period. + References No definition available. + Details
Name: | deer_StatutoryReserveAppropriated
Namespace Prefix: | deer_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Allocation percentage for statutory reserves for income after taxes. + References No definition available. + Details
Name: | deer_StatutoryReservePercentageAllocationOfIncomeAfterTax
Namespace Prefix: | deer_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of registered captial that that statutory reserve fund must meet. + References No definition available. + Details
Name: | deer_StatutoryReservePercentageOfRegisteredCapital
Namespace Prefix: | deer_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration