Annual report pursuant to Section 13 and 15(d)

Warrant Liability (Schedule of Warrant Liability Valuation) (Details)

v2.4.1.9
Warrant Liability (Schedule of Warrant Liability Valuation) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Derivative [Line Items]    
Fair value of warrants $ 93,789us-gaap_DerivativeLiabilitiesCurrent $ 85,221us-gaap_DerivativeLiabilitiesCurrent
Warrant Liability [Member]    
Derivative [Line Items]    
Strike price $ 10.00us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 10.00us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Market price $ 4.87ipdn_FairValueAssumptionsMarketPrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 4.61ipdn_FairValueAssumptionsMarketPrice
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Expected life 4 years 2 months 1 day 6 years
Risk-free interest rate 1.62%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
0.86%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Dividend yield 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Volatility 42.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
39.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Warrants outstanding 131,250us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
131,250us-gaap_ClassOfWarrantOrRightOutstanding
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
Fair value of warrants $ 93,789us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember
$ 85,221us-gaap_DerivativeLiabilitiesCurrent
/ us-gaap_FairValueByLiabilityClassAxis
= us-gaap_DerivativeFinancialInstrumentsLiabilitiesMember