XML 59 R23.htm IDEA: XBRL DOCUMENT
v2.4.0.6

SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
SIGNIFICANT ACCOUNTING POLICIES [Abstract] |
Estimated Useful Lives of Fixed Assets |
|  | Years |
Electronic equipment |  | 3-7 |
Office furniture and equipment |  | 7-15 |
Weighted Average Assumptions Used in Determining Fair Market Value of Options |
|  | 2 0 1 2 |  |  | 2 0 1 1 |  |  | 2 0 1 0 |
Risk-free interest rate |  | 0.66% |  |  | 1.35% |  |  | 2.35% |
Expected life of options |  | 4.75 years |  |  | 4.75 years |  |  | 6.25 years |
Expected volatility |  | 87.86% |  |  | 88.06% |  |  | 81.77% |
Expected dividend yield |  | 0% |  |  | 0% |  |  | 0%

X
- Definition Tabular disclosure of the useful life of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | nvmi_ScheduleOfPropertyPlantAndEquipmentEstimatedUsefulLivesTableTextBlock
Namespace Prefix: | nvmi_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration