Description Of Business (Details) (USD $)	12 Months Ended		3 Months Ended
Dec. 31, 2012	Jun. 30, 2013 item	Sep. 30, 2011 Scenario, Forecast [Member] Maximum [Member]	Sep. 30, 2011 Scenario, Forecast [Member] Minimum [Member]
Description Of Business [Line Items]
Cumulative losses incurred from inception	$ (384,645,873)	$ (392,572,812)
Installed base		88
Reduction in operating expenses	$ 19,000,000
Annual plan to rebalance and reduce operating expenses, percentage	31.00%		20.00%	15.00%

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 31

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.31(a)(3))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant