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Consolidated Statements of Cash Flows (Unaudited) (USD $)
6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ 3,571,462us-gaap_NetIncomeLoss $ (8,095,643)us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation and amortization 55,185us-gaap_DepreciationDepletionAndAmortization 56,568us-gaap_DepreciationDepletionAndAmortization
Non-cash interest expense 8,486us-gaap_AmortizationOfFinancingCostsAndDiscounts 0us-gaap_AmortizationOfFinancingCostsAndDiscounts
Other 0us-gaap_OtherNoncashIncome (346)us-gaap_OtherNoncashIncome
Stock-based compensation 512,390us-gaap_ShareBasedCompensation 405,629us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities:    
Accounts receivable (3,035,400)us-gaap_IncreaseDecreaseInAccountsReceivable 0us-gaap_IncreaseDecreaseInAccountsReceivable
Prepaid expenses and other assets (1,255,646)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets 32,470us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Accounts payable 1,152,758us-gaap_IncreaseDecreaseInAccountsPayable (47,734)us-gaap_IncreaseDecreaseInAccountsPayable
Accrued expenses 1,412,699us-gaap_IncreaseDecreaseInAccruedLiabilities 456,398us-gaap_IncreaseDecreaseInAccruedLiabilities
Deferred revenue (1,000,000)PTN_IncreaseDecreaseInUnearnedRevenues 1,000,000PTN_IncreaseDecreaseInUnearnedRevenues
Net cash provided by (used in) operating activities 1,421,934us-gaap_NetCashProvidedByUsedInOperatingActivities (6,192,658)us-gaap_NetCashProvidedByUsedInOperatingActivities
CASH FLOWS FROM INVESTING ACTIVITIES:    
Proceeds from maturity of investments 0PTN_ProceedsFromSalematurityOfInvestments 3,750,000PTN_ProceedsFromSalematurityOfInvestments
Purchases of property and equipment 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (6,239)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net cash provided by investing activities 0us-gaap_NetCashProvidedByUsedInInvestingActivities 3,743,761us-gaap_NetCashProvidedByUsedInInvestingActivities
CASH FLOWS FROM FINANCING ACTIVITIES:    
Payments on capital lease obligations 0us-gaap_RepaymentsOfLongTermCapitalLeaseObligations (11,794)us-gaap_RepaymentsOfLongTermCapitalLeaseObligations
Payment of withholding taxes related to restricted stock units (122,067)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation (25,214)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Proceeds from sale of common stock and warrants, net of costs 19,348,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity 0us-gaap_ProceedsFromIssuanceOrSaleOfEquity
Proceeds from the issuance of notes payable and warrants 10,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt 0us-gaap_ProceedsFromIssuanceOfLongTermDebt
Payment of debt issuance costs (138,000)us-gaap_PaymentsOfDebtIssuanceCosts 0us-gaap_PaymentsOfDebtIssuanceCosts
Net cash provided by (used in) financing activities 29,087,933us-gaap_NetCashProvidedByUsedInFinancingActivities (37,008)us-gaap_NetCashProvidedByUsedInFinancingActivities
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS 30,509,867us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (2,485,905)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, beginning of period 12,184,605us-gaap_CashAndCashEquivalentsAtCarryingValue 19,167,632us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, end of period 42,694,472us-gaap_CashAndCashEquivalentsAtCarryingValue 16,681,727us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL CASH FLOW INFORMATION:    
Cash paid for interest 2,601us-gaap_InterestPaid 2,805us-gaap_InterestPaid
Interest accrued on long-term debt 22,500PTN_InterestAccruedOnLongtermDebt 0PTN_InterestAccruedOnLongtermDebt
Equipment acquired under capital lease 80,000PTN_EquipmentAcquiredUnderCapitalLease 0PTN_EquipmentAcquiredUnderCapitalLease
Non-cash equity financing costs in accounts payable 490,000PTN_NoncashEquityFinancingCostsInAccountsPayable 0PTN_NoncashEquityFinancingCostsInAccountsPayable
Non-cash equity financing costs in accrued expenses 285,000PTN_NoncashEquityFinancingCostsInAccruedExpenses 0PTN_NoncashEquityFinancingCostsInAccruedExpenses
Non-cash debt financing costs in accounts payable 10,000PTN_NoncashDebtFinancingCostsInAccountsPayable 0PTN_NoncashDebtFinancingCostsInAccountsPayable
Non-cash debt financing costs in accrued expenses 60,000PTN_NoncashDebtFinancingCostsInAccruedExpenses 0PTN_NoncashDebtFinancingCostsInAccruedExpenses
Issuance of warrants in connection with debt financing $ 267,820PTN_IssuanceOfWarrantsInConnectionWithDebtFinancing $ 0PTN_IssuanceOfWarrantsInConnectionWithDebtFinancing