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Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental Cash Flow Information [Abstract]
Cash paid for interest	$ 34	$ 32	$ 7
Cash paid for income taxes	$ 5,422	$ 2,870	$ 2,431
Value of Shares issued for acquisition of iQvolution			546

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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- Definition

The number of shares issued as [noncash or part noncash] consideration for a business or asset acquired. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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