Name:	os_WaivedShares
Namespace Prefix:	os_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Paragraph 1
-Subparagraph (SX 210.5-02(29))
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Name:	us-gaap_CommonStockSharesOutstanding
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Number of new stock issued during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Subparagraph (SX 210.3-04)
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Period Type:	duration

Number of shares of stock issued attributable to transactions classified as other.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 10
-Section S99
-Paragraph 4
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