XML 57 R51.htm IDEA: XBRL DOCUMENT v2.4.0.6
FAIR VALUE ACCOUNTING (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Assets:      
Short-term investments   $ 3,933  
Marketable equity securities 6 1,480 4,576
Recurring | Total
      
Assets:      
Cash and cash equivalents 18,520 13,416  
Short-term investments   3,933  
Marketable equity securities 6 1,480  
Assets 18,526 18,829  
Liabilities:      
Accounts payable and accrued liabilities 7,181 5,612  
Recurring | Level 1
      
Assets:      
Cash and cash equivalents 18,520 13,416  
Short-term investments   3,933  
Marketable equity securities 6 897  
Assets 18,526 18,246  
Recurring | Level 2
      
Assets:      
Marketable equity securities   583  
Assets   583  
Liabilities:      
Accounts payable and accrued liabilities $ 7,181 $ 5,612