Accounts Receivable

12 Months Ended

Dec. 29, 2019

Our customers consist mainly of wholesale distributors, dealers, and retail home centers. Our ten largest customers accounted for 44.9% and 54.6% of total accounts receivable as of December 29, 2019, and December 30, 2018, respectively. Our largest customer, The Home Depot, Inc. accounted for more than 10% of the consolidated gross accounts receivable balance as of December 29, 2019, and December 30, 2018. No other individual customer accounted for greater than 10% of the consolidated gross accounts receivable balance at either December 29, 2019, or December 30, 2018.

The changes in the allowance for doubtful accounts were as follows for the periods indicated:



	Year Ended
(In thousands)	December 29, 2019			December 30, 2018			December 31, 2017
Balance at beginning of period	$	2,109		$	1,785		$	1,010
Additions charged to expense	78			676			793
Deductions	(435		)	(352		)	(18		)
Balance at end of period	$	1,752		$	2,109		$	1,785

We maintain an accounts receivable sales program with a third party (the "AR Sales Program"). Under the AR Sales Program, we can transfer ownership of eligible trade accounts receivable of certain customers. Receivables are sold outright to a third party who assumes the full risk of collection, without recourse to us in the event of a loss. Transfers of receivables under this program are accounted for as sales. Proceeds from the transfers reflect the face value of the accounts receivable less a discount. Receivables sold under the AR Sales Program are excluded from trade accounts receivable in the consolidated balance sheets and are included in cash flows from operating activities in the consolidated statements of cash flows. The discounts on the sales of trade accounts receivable sold under the AR Sales Program were not material for any of the periods presented and were recorded in selling, general and administration expense within the consolidated statements of comprehensive income.