DEBT (Details) (USD $) In Millions, unless otherwise specified				12 Months Ended
	Dec. 31, 2011 Line of credit	Dec. 31, 2010 Line of credit	May 31, 2010 Line of credit	Dec. 31, 2011 Line of credit Base (prime) rate	Dec. 31, 2011 Line of credit London Interbank Offered Rates	Dec. 31, 2011 Capital lease obligations M	Dec. 31, 2010 Capital lease obligations	Dec. 31, 2009 Capital lease obligations	Dec. 31, 2011 Capital lease obligations Assets acquired under capital leases	Dec. 31, 2010 Capital lease obligations Assets acquired under capital leases
DEBT
Maximum borrowing capacity			$ 10.0
Effective interest rate on borrowing				Base (prime) rate	London Interbank Offered Rates up to 180 days
Percentage to be subtracted to compute the variable rate on the debt instrument				1.50%
Percentage that needs to be added to compute the variable rate on the debt instrument					1.75%
Amount outstanding	0.3	0.3
Company debt consisting of capital leases						1.1	0.3
Period over which monthly installments are payable						12
Assets acquired under capital leases
Net book value									3.6	2.1
Accumulated depreciation									2.1	2.3
Interest expenses for capital lease obligations						$ 0.05	$ 0.01	$ 0.05