3. Allowance for Doubtful Accounts

12 Months Ended

Dec. 31, 2012

Notes to Financial Statements

3. Allowance for Doubtful Accounts

Changes in the allowance for doubtful accounts is composed of the following:

	Years Ended December 31,
	2012			2011		2010
Balance, beginning of year	$	44		$	44	$	44
Provision for doubtful accounts		-			-		17
Uncollectible accounts written off		(5	)		-		(17	)
Balance, end of year	$	39		$	44	$	44