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9. EMPLOYEE AND DIRECTOR EQUITY INCENTIVE PLANS (Details 1) (USD $)
9 Months Ended 12 Months Ended
Mar. 31, 2015
Jun. 30, 2014
Outstanding Number of Options, Ending balance 1,664,778us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber  
Outstanding, ending, Weighted-Average Exercise Price $ 2.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice  
Average Remaining Contractual Life of Outstanding Options 5 years 11 months 16 days  
Employee and Director Plans    
Outstanding Number of Options, Beginning balance 1,419,068us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
785,284us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Options granted 420,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
699,850us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Options forfeited (174,790)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
(66,066)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Outstanding Number of Options, Ending balance 1,664,778us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
1,419,068us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Outstanding, ending, Weighted-Average Exercise Price $ 3.23us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
$ 5.78us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Options granted $ 0.85us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
$ 1.33us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Options forfeited $ 3.50us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
$ 13.23us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Outstanding, ending, Weighted-Average Exercise Price $ 2.61us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
$ 3.23us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= ZBB_EmployeeAndDirectorPlansMember
Average Remaining Contractual Life of Outstanding Options 5 years 11 months 16 days 6 years 1 month 2 days