Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Summary Of Significant Accounting Policies [Line Items]
Net reduction in shareholders' equity due to foreign currency translation adjustments	$ 1,743	$ 263	$ 995	$ (719)	$ 1,984
Transaction net gains and losses resulting from the company's foreign operations	128	(42)	285	(33)
Cash held in fixed term deposits with original maturities of three months or less at the time of purchase					500
Increase in cash accounts exceed FDIC insured amount	250		250
Cash and cash equivalents in foreign denominated currencies held in foreign banks	15,356		15,356		13,536
Foreign denominated currencies held in foreign banks represented as percentage of total cash and cash equivalents	18.60%		18.60%		20.10%
Self-insurance accruals	1,312		1,312		1,083
Reimbursed expenses	1,635	1,597	3,254	2,588
Number of elements KNXA's licenses may have				2
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts located in the United States insured by FDIC	$ 100		$ 100
Accounts Receivable [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage			10.30%		9.00%
Sales Revenue, Services, Net [Member]
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage	9.30%	12.00%	10.40%	11.10%