v2.4.1.9
STOCKHOLDERS' EQUITY (Details 4) (Employee Stock Option [Member], USD $)
6 Months Ended 12 Months Ended
Nov. 30, 2015
May 31, 2015
Employee Stock Option [Member]
   
Options    
Outstanding 337,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
190,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Granted 12,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
147,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Exercised 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Expired or cancelled 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Decrease in weighted average exercise price due to modification (1)   0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecrease
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
[1]
Outstanding 349,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
337,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Weighted Average Exercise Price    
Outstanding $ 13.10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
$ 20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Granted $ 10us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
$ 17.2us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Exercised   $ 0us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Expired or cancelled   $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Decrease in weighted average exercise price due to modification (1)   $ (4.1)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingPeriodIncreaseDecreaseWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
[1]
Outstanding $ 13.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
$ 13.10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Aggregate Intrinsic Value    
Aggregate Intrinsic Value Outstanding $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
Aggregate Intrinsic Value Outstanding $ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
$ 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityEquityAxis
= us-gaap_EmployeeStockOptionMember
[1] On December 8, 2014, the Company modified the exercise price on its unvested 138,000 options from an exercise price of $20.00 per share to $10.00 per share.