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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (3,335,291)us-gaap_ProfitLoss $ (2,411,531)us-gaap_ProfitLoss
Adjustments to reconcile net loss to net cash used in operating activities:    
Compensation cost for stock options granted 180,628us-gaap_ShareBasedCompensation 230,181us-gaap_ShareBasedCompensation
Depreciation and amortization 84,867us-gaap_DepreciationDepletionAndAmortization 125,097us-gaap_DepreciationDepletionAndAmortization
Bad debt expense 218,482us-gaap_ProvisionForDoubtfulAccounts 27,860us-gaap_ProvisionForDoubtfulAccounts
Changes in operating assets and liabilities:    
Accounts receivable (1,200,733)us-gaap_IncreaseDecreaseInAccountsReceivable 19,796us-gaap_IncreaseDecreaseInAccountsReceivable
Inventory (54,840)us-gaap_IncreaseDecreaseInInventories 0us-gaap_IncreaseDecreaseInInventories
Prepaid expenses (16,556)us-gaap_IncreaseDecreaseInPrepaidExpense (245,178)us-gaap_IncreaseDecreaseInPrepaidExpense
Increase in other assets (128,359)us-gaap_IncreaseDecreaseInOtherOperatingAssets (24,863)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Accounts payable 371,851us-gaap_IncreaseDecreaseInAccountsPayable 42,944us-gaap_IncreaseDecreaseInAccountsPayable
Payroll liabilities 222,823us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities (150,504)us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities
Deferred rent 4,744atos_IncreaseDecreaseInDeferredRent (13,134)atos_IncreaseDecreaseInDeferredRent
Accrued expenses 653,034us-gaap_IncreaseDecreaseInAccruedLiabilities (75,905)us-gaap_IncreaseDecreaseInAccruedLiabilities
Product recall liabilities 0atos_IncreaseDecreaseInProductRecallLiabilities (115,292)atos_IncreaseDecreaseInProductRecallLiabilities
Other current liabilities 687us-gaap_IncreaseDecreaseInOtherCurrentLiabilities (13,460)us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Net cash used in operating activities (2,998,663)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (2,603,989)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchase of furniture and equipment (54,860)us-gaap_PaymentsToAcquireFurnitureAndFixtures (2,966)us-gaap_PaymentsToAcquireFurnitureAndFixtures
Purchase of intangible assets (11,175)us-gaap_PaymentsToAcquireSoftware (100,000)us-gaap_PaymentsToAcquireSoftware
Net cash used in investing activities (66,035)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (102,966)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
CASH FLOWS FROM FINANCING ACTIVITIES    
Net proceeds from issuance of common stock and warrants 4,292,349atos_ProceedsFromIssuanceOfCommonStockAndWarrants 12,955,745atos_ProceedsFromIssuanceOfCommonStockAndWarrants
Net cash provided by financing activities 4,292,349us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 12,955,745us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
NET INCREASE IN CASH AND CASH EQUIVALENTS 1,227,651us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 10,248,790us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
CASH AND CASH EQUIVALENTS, BEGINNING BALANCE 8,500,718us-gaap_CashAndCashEquivalentsAtCarryingValue 6,342,161us-gaap_CashAndCashEquivalentsAtCarryingValue
CASH AND CASH EQUIVALENTS, ENDING BALANCE 9,728,369us-gaap_CashAndCashEquivalentsAtCarryingValue 16,590,951us-gaap_CashAndCashEquivalentsAtCarryingValue
SUPPLEMENTAL DISCLOSURES:    
Interest paid 1,784us-gaap_InterestPaid 749us-gaap_InterestPaid
NONCASH INVESTING AND FINANCING ACTIVITIES:    
Noncash reclass of prepaid license fees    15,000atos_NoncashReclassOfPrepaidLicenseFees
Amortization of commitment shares $ 351,961atos_AmortizationOfCommitmentSharesIssuedForSharesDistributedForCapitalContribution $ 75,000atos_AmortizationOfCommitmentSharesIssuedForSharesDistributedForCapitalContribution