Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2011

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

VALUATION AND QUALIFYING ACCOUNTS

(in thousands)

Description	Balance at Beginning of Year		Charged (Credited) to Costs and Expenses		Balance at End of Year
Allowance for doubtful accounts:
Year ended December 31, 2009
Trade accounts receivable	$	185	$	133	$	318
	$	185	$	133	$	318
Year ended December 31, 2010
Trade accounts receivable	$	318	$	27	$	345
	$	318	$	27	$	345
Year ended December 31, 2011
Trade accounts receivable	$	345	$	153	$	498
	$	345	$	153	$	498