XML 16 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6

Segment Information and Concentrations of Risk (Details 2)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net revenues by geographic region
Net revenues by geographic region	100.00%	100.00%	100.00%	100.00%
United States and Canada [Member]
Net revenues by geographic region
Net revenues by geographic region	92.70%	95.20%	92.20%	93.30%
Latin America [Member]
Net revenues by geographic region
Net revenues by geographic region	1.50%		3.00%
Europe / Middle East / Africa [Member]
Net revenues by geographic region
Net revenues by geographic region	5.50%	3.30%	4.40%	4.20%
Asia/Australia [Member]
Net revenues by geographic region
Net revenues by geographic region	0.30%	1.50%	0.40%	2.50%

X

- Details

Name:	nvtl_NetRevenuesByGeographicRegionAbstract
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