SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Dec. 31, 2011

SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS

For the years ended December 31, 2011, 2010 and 2009

(in thousands of dollars)

	Balance at beginning of year		Additions (A)		Deductions (B)			Other (C)			Balance at end of year
Allowance for doubtful accounts
Year ended December 31, 2011	$	306	$	483	$	(256	)	$	(59	)	$	474
Year ended December 31, 2010	$	751	$	460	$	( 1,014	)	$	109		$	306
Year ended December 31, 2009	$	122	$	663	$	(34	)	$	-		$	751

(A)

Includes increases to allowances for doubtful accounts, net of any equipment recovered

(B)

Includes write off of uncollectible accounts receivable, net of any equipment recovered

(C)

Includes collections fees incurred and product sales amounts deferred that do not meet revenue recognition criteria, net of cash received