XML 53 R39.htm IDEA: XBRL DOCUMENT
v3.10.0.1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) | 1 Months Ended
--- | ---
Jan. 31, 2018
SAT |
Revenue Recognition |
Term of contract | 2 years

X
- Definition Period of the contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | osis_TermOfContract
Namespace Prefix: | osis_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_RevenueRecognitionAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorCustomersAxis=osis_ServicioDeAdministracionTributariaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |