Annual report pursuant to Section 13 and 15(d)

Employee Stock Options (Summary of Information About Stock Options Outstanding) (Details)

v2.4.1.9
Employee Stock Options (Summary of Information About Stock Options Outstanding) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Stock options outstanding , exercise price range [Line Items]  
Options Outstanding, Number of Shares 10,791,081us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Options Outstanding, Weighted-Average Remaining Contractual Life 7 years 4 months 20 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 0.79us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Options Exercisable, Number of Shares 5,136,036us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0.46us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
$0.04 - $0.07 [Member]  
Stock options outstanding , exercise price range [Line Items]  
Exercise price, minimum (in dollars per share) $ 0.04us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeOneMember
Exercise price, maximum (in dollars per share) $ 0.07us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeOneMember
Options Outstanding, Number of Shares 870,611us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeOneMember
Options Outstanding, Weighted-Average Remaining Contractual Life 3 years 8 months 16 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 0.05us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeOneMember
Options Exercisable, Number of Shares 870,611us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeOneMember
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0.05us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeOneMember
$0.39 - $1.00 [Member]  
Stock options outstanding , exercise price range [Line Items]  
Exercise price, minimum (in dollars per share) $ 0.39us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeTwoMember
Exercise price, maximum (in dollars per share) $ 1.00us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeTwoMember
Options Outstanding, Number of Shares 7,633,920us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeTwoMember
Options Outstanding, Weighted-Average Remaining Contractual Life 7 years 1 month 17 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 0.65us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeTwoMember
Options Exercisable, Number of Shares 4,228,987us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeTwoMember
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0.53us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeTwoMember
$1.06 - $2.19 [Member]  
Stock options outstanding , exercise price range [Line Items]  
Exercise price, minimum (in dollars per share) $ 1.06us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeThreeMember
Exercise price, maximum (in dollars per share) $ 2.19us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeThreeMember
Options Outstanding, Number of Shares 2,286,550us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeThreeMember
Options Outstanding, Weighted-Average Remaining Contractual Life 9 years 8 months 5 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) $ 1.55us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeThreeMember
Options Exercisable, Number of Shares 36,438us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeThreeMember
Options Exercisable, Weighted Average Exercise Price (in dollars per share) $ 2.02us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
/ us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis
= ekso_ExercisePriceRangeThreeMember