Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Details)

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Intangible Assets (Details) (L-3 Communications, Inc. ("L-3"), USD $)
Nov. 03, 2014
L-3 Communications, Inc. ("L-3")
 
Assets:  
Current assets, consisting primarily of inventory of $940.1 thousand and prepaid assets of $47.1 thousand $ 987,200us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= opxs_LThreeCommunicationsIncMember
Identifiable intangible assets 342,200us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= opxs_LThreeCommunicationsIncMember
Other non-current assets, principally property and equipment 2,064,700us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentAssets
/ us-gaap_BusinessAcquisitionAxis
= opxs_LThreeCommunicationsIncMember
Total assets 3,394,100us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
/ us-gaap_BusinessAcquisitionAxis
= opxs_LThreeCommunicationsIncMember
Liabilities:  
Current liabilities, consisting of accounts payable of $119.4 thousand and accrued liabilities of $151.3 thousand (270,700)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
/ us-gaap_BusinessAcquisitionAxis
= opxs_LThreeCommunicationsIncMember
Acquired net assets $ 3,123,400us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= opxs_LThreeCommunicationsIncMember