Quarterly report pursuant to Section 13 or 15(d)

Debt Financing (Details)

v2.4.1.9
Debt Financing (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 1 Months Ended
Dec. 28, 2014
Nov. 17, 2014
Debt Instrument [Line Items]    
Derivative Value $ 6,127us-gaap_DerivativeLiabilitiesNoncurrent  
Change in Fair Value - Derivatives 847us-gaap_UnrealizedGainLossOnDerivatives  
Convertible promissory note    
Debt Instrument [Line Items]    
Notes 1,560us-gaap_ConvertibleDebtFairValueDisclosures
/ 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
 
Convertible promissory note | Investors    
Debt Instrument [Line Items]    
Notes   1,550us-gaap_ConvertibleDebtFairValueDisclosures
/ us-gaap_LineOfCreditFacilityAxis
= opxs_InvestorsMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Derivative Value 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
Change in Fair Value - Derivatives     
Convertible promissory note | Brokers    
Debt Instrument [Line Items]    
Notes   10us-gaap_ConvertibleDebtFairValueDisclosures
/ us-gaap_LineOfCreditFacilityAxis
= opxs_PlacementAgencyMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_ConvertibleDebtMember
Derivative Value 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
Change in Fair Value - Derivatives