Shareholders' Equity (Summary Of Information About Stock Options Outstanding) (Details) (USD $)	12 Months Ended
Dec. 31, 2012
Options Oustanding, Number Oustanding	1,469,673
Options Oustanding, Weighted Average Remaining Contractual Life	7 years 9 months 18 days
Options Oustanding, Weighted Average Exercise Price Per Share	$ 3.03
Options Exercisable, Number Exercisable	572,552
Options Exercisable, Weighted Average Exercise Price Per Share	$ 4.08
$1.61 - $2.80 [Member]
Ranges of Exercise Prices, Lower	$ 1.61
Ranges of Exercise Prices, Upper	$ 2.80
Options Oustanding, Number Oustanding	906,522
Options Oustanding, Weighted Average Remaining Contractual Life	8 years 7 months 17 days
Options Oustanding, Weighted Average Exercise Price Per Share	$ 1.85
Options Exercisable, Number Exercisable	230,055
Options Exercisable, Weighted Average Exercise Price Per Share	$ 2.34
$3.13 - $5.49 [Member]
Ranges of Exercise Prices, Lower	$ 3.13
Ranges of Exercise Prices, Upper	$ 5.49
Options Oustanding, Number Oustanding	512,251
Options Oustanding, Weighted Average Remaining Contractual Life	7 years 26 days
Options Oustanding, Weighted Average Exercise Price Per Share	$ 4.56
Options Exercisable, Number Exercisable	291,597
Options Exercisable, Weighted Average Exercise Price Per Share	$ 4.66
$5.80 - $9.28 [Member]
Ranges of Exercise Prices, Lower	$ 5.80
Ranges of Exercise Prices, Upper	$ 9.28
Options Oustanding, Number Oustanding	19,700
Options Oustanding, Weighted Average Remaining Contractual Life	3 months 22 days
Options Oustanding, Weighted Average Exercise Price Per Share	$ 5.84
Options Exercisable, Number Exercisable	19,700
Options Exercisable, Weighted Average Exercise Price Per Share	$ 5.84
$9.58 - $10.90 [Member]
Ranges of Exercise Prices, Lower	$ 9.58
Ranges of Exercise Prices, Upper	$ 10.90
Options Oustanding, Number Oustanding	31,200
Options Oustanding, Weighted Average Remaining Contractual Life	1 month 24 days
Options Oustanding, Weighted Average Exercise Price Per Share	$ 10.37
Options Exercisable, Number Exercisable	31,200
Options Exercisable, Weighted Average Exercise Price Per Share	$ 10.37

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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 (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(1)(a, b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

+ Details

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

+ Details

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