XML 23 R43.htm IDEA: XBRL DOCUMENT v2.4.0.6

Segment Information and Concentrations of Risk (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Customer One [Member]
Segment Information and Concentrations of Risk (Textual) [Abstract]
Net Revenue, Percentage	57.00%	49.00%	58.00%	45.00%
Customer Two [Member]
Segment Information and Concentrations of Risk (Textual) [Abstract]
Net Revenue, Percentage	10.00%	11.00%	10.00%	13.00%
Customer Three [Member]
Segment Information and Concentrations of Risk (Textual) [Abstract]
Net Revenue, Percentage				10.00%

X

- Details

Name:	nvtl_SegmentInformationAndConcentrationsOfRiskTextualAbstract
Namespace Prefix:	nvtl_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_EntityWideRevenueMajorCustomerPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration