XML 14 R48.htm IDEA: XBRL DOCUMENT v2.4.1.9
STOCK BASED COMPENSATION (Details 1) (USD $)
3 Months Ended
Mar. 31, 2015
Employees [Member]  
Share Based Payment Award Stock Options Valuation Assumption [Line Items]  
Dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Expected forfeiture per year (%) 10.00%atos_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedForfeitureRate
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Weighted average fair value of the options per unit $ 1.56atos_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageFairValue
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Employees [Member] | Minimum [Member]  
Share Based Payment Award Stock Options Valuation Assumption [Line Items]  
Fair value of common stock on date of grant $ 1.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Exercise price of the options $ 1.40us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Expected life of the options (years) 6 years 14 days
Expected volatility 113.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Risk free rate 1.64%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Employees [Member] | Maximum [Member]  
Share Based Payment Award Stock Options Valuation Assumption [Line Items]  
Fair value of common stock on date of grant $ 1.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Exercise price of the options $ 1.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Expected life of the options (years) 6 years 1 month 17 days
Expected volatility 115.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Risk free rate 1.79%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_TitleOfIndividualAxis
= atos_EmployeesMember
Executives and Officers [Member]  
Share Based Payment Award Stock Options Valuation Assumption [Line Items]  
Fair value of common stock on date of grant $ 1.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember
Exercise price of the options $ 1.88us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExercisePrice
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember
Expected life of the options (years) 6 years 22 days
Dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember
Expected volatility 113.50%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember
Risk free rate 1.74%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember
Expected forfeiture per year (%) 10.00%atos_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedForfeitureRate
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember
Weighted average fair value of the options per unit $ 1.59atos_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageFairValue
/ us-gaap_TitleOfIndividualAxis
= atos_ExecutivesAndOfficersMember