Quarterly report pursuant to Section 13 or 15(d)

Debt Financing (Details Textuals 2)

v2.4.1.9
Debt Financing (Details Textuals 2) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 3 Months Ended
Nov. 17, 2014
Dec. 28, 2014
Debt Instrument [Line Items]    
Derivative Value   $ 6,127us-gaap_DerivativeLiabilitiesNoncurrent
Change in Fair Value - Derivatives   847us-gaap_UnrealizedGainLossOnDerivatives
Convertible notes payable (net of discount)   33us-gaap_ConvertibleLongTermNotesPayable
Convertible promissory note    
Debt Instrument [Line Items]    
Stock projections historical volatilities 202.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
197.00%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Percentage of Stock price exceed conversion price   200.00%opxs_PercentageOfStockPriceExceedConversionPrice
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Default event occuring increase percentage   0.25%opxs_DefaultEventOccurringIncreasePercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Derivative Value   6,127us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Change in Fair Value - Derivatives   (847)us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Unamortized debt discount (1,560)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
(1,527)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Note balance   1,560us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Convertible notes payable (net of discount)   33us-gaap_ConvertibleLongTermNotesPayable
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Convertible promissory note | Other Expense    
Debt Instrument [Line Items]    
Change in Fair Value - Derivatives   $ (847)us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherExpenseMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Convertible promissory note | Minimum    
Debt Instrument [Line Items]    
Default event occurring percentage   0.00%opxs_DefaultEventOccurringPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Discount rates based on risk-free rate   0.54%us-gaap_FairValueInputsDiscountRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Convertible promissory note | Maximum    
Debt Instrument [Line Items]    
Default event occurring percentage   5.00%opxs_DefaultEventOccurringPercentage
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Discount rates based on risk-free rate   0.73%us-gaap_FairValueInputsDiscountRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember