Capitalizing employee salaries and outside contract programmers payments relating to the development of the asset.

No definition available.

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Namespace Prefix:	onsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Employee salaries and outside contract programmers payment relating to asset development placed in service.

+ References

No definition available.

+ Details

Name:	onsm_EmployeeSalariesAndOutsideContractProgrammersPaymentRelatingToAssetDevelopmentInServiceAmount
Namespace Prefix:	onsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

+ Details

Name:	us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

PROPERTY AND EQUIPMENT (Detail) (USD $)	3 Months Ended		6 Months Ended						3 Months Ended			3 Months Ended
PROPERTY AND EQUIPMENT (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Initial Release [Member] DMSP [Member]	Mar. 31, 2013 Subsequent Release [Member] DMSP [Member]	Dec. 31, 2009 iEncode Software [Member] Webcasting [Member]	Jan. 31, 2013 New Release of Basic Webcasting Platform [Member] Webcasting [Member]	Mar. 31, 2013 DMSP [Member]	Mar. 31, 2013 MP365 [Member] Phase One [Member]	Mar. 31, 2013 MP365 [Member] Phase Two [Member]	Mar. 31, 2013 MP365 [Member]	Mar. 31, 2013 Webcasting [Member]
Depreciation, Depletion and Amortization	$ 225,000	$ 228,000	$ 424,000	$ 455,000
Finite-Lived Intangible Assets, Net									2,700,000
Employee Salaries and Outside Contract Programmers Payment Relating to Asset Development Capitalized Amount									1,100,000			1,400,000	1,300,000
Employee Salaries and Outside Contract Programmers Payment Relating to Asset Development In Service Amount					$ 410,000	$ 231,000	$ 444,000	$ 324,000	$ 816,000	$ 297,000	$ 675,000		$ 1,144,000