XML 17 R48.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Intangible assets included operating costs and expenses |  |  |
Amortization of purchased intangible assets | $ 1,074 | $ 2,220 | $ 179
Cost of net revenues [Member] |  |  |
Intangible assets included operating costs and expenses |  |  |
Amortization of purchased intangible assets | 1,623 | 4,102 |
General and administrative expenses [Member] |  |  |
Intangible assets included operating costs and expenses |  |  |
Amortization of purchased intangible assets | $ 1,074 | $ 2,220 |

X
- Details
Name: | nvtl_IntangibleAssetsIncludedOperatingCostsAndExpensesAbstract
Namespace Prefix: | nvtl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The aggregate expense charged against earnings to allocate the cost of acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method. + References No definition available. + Details
Name: | us-gaap_AmortizationOfAcquiredIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration