XML 54 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Significant Accounting Policies [Abstract] |
Schedule Of Annual Depreciation Rates |
| %
Computers, manufacturing and peripheral equipment | 6- 33
Office furniture and equipment | Mainly 7
Leasehold improvements | Over the shorter of the term of the lease or useful life of the asset
Schedule Of Stock Option Granted Assumptions |
|  | December 31, |
|  | 2010 |  |  | 2011 |  |  | 2012 |
Dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Volatility |  |  | 41%-66 | % |  |  | 37%-60 | % |  |  | 40%-64 | %
Risk free interest |  |  | 0.25%-3.9 | % |  |  | 0.1%-3.48 | % |  |  | 0.1%-2.30 | %
Early exercise multiple |  |  | 2.0-2.50 |  |  |  | 1.85-2.60 |  |  |  | 1.55-1.85 |

X
- Definition Schedule Of Annual Depreciation Rates + References No definition available. + Details
Name: | crnt_ScheduleOfAnnualDepreciationRatesTableTextBlock
Namespace Prefix: | crnt_
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