3. Allowance for Doubtful Accounts

12 Months Ended

Dec. 31, 2014

Notes to Financial Statements

3. Allowance for Doubtful Accounts

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

	Years Ended December 31,
	2014			2013
Balance, beginning of year	$	84		$	39
Provision for doubtful accounts		35			51
Uncollectible accounts written off		(70	)		(6	)
Balance, end of year	$	49		$	84