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LONG-TERM DEBT (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Long-term Debt $ 22,957,754us-gaap_LongTermDebt $ 22,999,827us-gaap_LongTermDebt
Current portion of long-term debt (6,013,873)sdpi_LongTermDebtAndRelatedPartyDebtCurrent (10,720,243)sdpi_LongTermDebtAndRelatedPartyDebtCurrent
Long-term Debt, Excluding Current Maturities 16,943,881sdpi_LongTermDebtAndRelatedPartyDebtNoncurrent 12,279,584sdpi_LongTermDebtAndRelatedPartyDebtNoncurrent
Real estate loans [Member]    
Debt Instrument [Line Items]    
Long-term Debt 7,836,865us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_RealEstateLoansMember
7,912,354us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_RealEstateLoansMember
Hard Rock Note [Member]    
Debt Instrument [Line Items]    
Long-term Debt 11,897,333us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_HardRockNoteMember
11,671,333us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_HardRockNoteMember
Related Party Loan [Member]    
Debt Instrument [Line Items]    
Long-term Debt 1,490,703us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_RelatedPartyLoanMember
1,610,273us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_RelatedPartyLoanMember
Machinery loans [Member]    
Debt Instrument [Line Items]    
Long-term Debt 980,891us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_MachineryLoansMember
1,019,100us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_MachineryLoansMember
Transportation loans [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 751,962us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_TransportationLoansMember
$ 786,767us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= sdpi_TransportationLoansMember