XML 64 R53.htm IDEA: XBRL DOCUMENT v3.10.0.1

Subsequent Events - Addtional Informartion (Details) - Subsequent Event	Jul. 30, 2018 ft²
Subsequent Event [Line Items]
Lease extension term	6 years
Increase in size of the facility	6,121
New leases effective date	Sep. 01, 2108

X

- Definition

Increase in area of real estate property.

+ References

No definition available.

+ Details

Name:	oss_IncreaseInAreaOfRealEstateProperty
Namespace Prefix:	oss_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Lessee leasing arrangements operating leases effective date.

+ References

No definition available.

+ Details

Name:	oss_LesseeLeasingArrangementsOperatingLeasesEffectiveDate
Namespace Prefix:	oss_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee leasing arrangements operating leases extened term.

+ References

No definition available.

+ Details

Name:	oss_LesseeLeasingArrangementsOperatingLeasesExtenedTerm
Namespace Prefix:	oss_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: