Quarterly report pursuant to Section 13 or 15(d)

Debt Financing (Details 1)

v2.4.1.9
Debt Financing (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended 3 Months Ended 1 Months Ended
Mar. 29, 2015
Mar. 29, 2015
Mar. 30, 2014
Dec. 28, 2014
Nov. 17, 2014
Interest Expense:          
Fair market value of derivatives $ 0us-gaap_DerivativeLiabilitiesNoncurrent $ 0us-gaap_DerivativeLiabilitiesNoncurrent   $ 6,127us-gaap_DerivativeLiabilitiesNoncurrent  
Debt discount on convertible notes 0us-gaap_DebtInstrumentUnamortizedDiscount 0us-gaap_DebtInstrumentUnamortizedDiscount      
Change in Fair Value - Derivatives (gain) /loss (847)us-gaap_UnrealizedGainLossOnDerivatives          
Convertible debt          
Interest Expense:          
Fair market value of derivatives 0us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
0us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  6,127us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Debt discount on convertible notes       (1,527)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
(1,560)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Fair value adjustment on convertible notes issued 11/17/14 (5,414)us-gaap_LiabilitiesFairValueAdjustment
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
     5,414us-gaap_LiabilitiesFairValueAdjustment
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Debt discount amortization (33)us-gaap_AmortizationOfDebtDiscountPremium
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
     33us-gaap_AmortizationOfDebtDiscountPremium
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Note interest at 12% per annum 46us-gaap_InterestExpenseDebtExcludingAmortization
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
69us-gaap_InterestExpenseDebtExcludingAmortization
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  23us-gaap_InterestExpenseDebtExcludingAmortization
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Debt issuance cost amortization 70us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
74us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  4us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Total Interest Expense (Convertible Notes) (5,474)us-gaap_InterestExpenseDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
143us-gaap_InterestExpenseDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  5,474us-gaap_InterestExpenseDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Change in Fair Value - Derivatives (gain) /loss 847us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
     (847)us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Convertible debt | Investors          
Interest Expense:          
Fair market value of derivatives (6,929)us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
(6,929)us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  6,929us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
6,929us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Debt discount on convertible notes 1,550us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
1,550us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  (1,550)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Change in Fair Value - Derivatives (gain) /loss           
Convertible debt | Brokers          
Interest Expense:          
Fair market value of derivatives (45)us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
(45)us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  45us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
45us-gaap_DerivativeLiabilitiesNoncurrent
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Debt discount on convertible notes 10us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
10us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
  (10)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
 
Change in Fair Value - Derivatives (gain) /loss