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Note 5 - Revenue Recognition - Schedule of Recognized Revenue Associated With Contract Liabilities (Details) - USD ($) | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024
Balance, beginning of period | $ 1,897,532 | $ 2,175,064
Recognized revenue associated with contract liabilities | (949,165) | (1,243,015)
Amounts collected or invoiced | 623,113 | 1,123,735
Balance, end of period | $ 1,571,480 | $ 2,055,784

X
- Definition Amount collected or invoiced for contract with customer liability during a period of time. + References No definition available. + Details
Name: | ipdn_ContractWithCustomerLiabilityAmountsCollectedOrInvoiced
Namespace Prefix: | ipdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue recognized including amount that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References No definition available. + Details
Name: | ipdn_ContractWithCustomerLiabilityRevenueRecognizedDuringPeriod
Namespace Prefix: | ipdn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant