The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Number of share instruments newly issued under a share-based compensation plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Stock Options Table Options Outstanding (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding Number of Options, Beginning			750
Outstanding Weighted Average Exercise Price, Beginning			$ 2.90
Exercisable Number of Options, Beginning			570
Exercisable Weighted Average Exercise Price, Beginning			$ 3.12
Outstanding Number of Options, Granted			1,110
Outstanding Weighted Average Exercise Price, Granted			$ 3.20
Outstanding Number of Options, Exercised	0	64	(5)	124
Outstanding Weighted Average Exercise Price, Exercised			$ 1.70
Outstanding Number of Options, Expired			(3)
Outstanding Weighted Average Exercise Price, Expired			$ 16.01
Outstanding Number of Options, Forfeited			(22)
Outstanding Weighted Average Exercise Price, Forfeited			$ 1.95
Outstanding Number of Options, Ending	1,830		1,830
Outstanding Weighted Average Exercise Price, Ending	$ 3.07		$ 3.07
Exercisable Number of Options, Ending	594		594
Exercisable Weighted Average Exercise Price, Ending	$ 2.98		$ 2.98