Commitments and Contingencies

Warranty Liabilities

The activity in the accrued warranty liabilities account was as follows (in thousands):



	Six Months Ended
	June 30, 2018			July 1, 2017
Balance at beginning of year	$	9,320		$	8,633
Additions charged to costs and expenses for current-year sales	6,106			4,243
Deductions from reserves	(5,790		)	(3,665		)
Changes in liability for pre-existing warranties during the current year, including expirations	132			(55		)
Balance at end of period	$	9,768		$	9,156

Legal Proceedings

We are involved from time to time in various legal proceedings arising in the ordinary course of our business, including primarily commercial, product liability, employment and intellectual property claims. In accordance with generally accepted accounting principles in the United States, we record a liability in our consolidated financial statements with respect to any of these matters when it is both probable that a liability has been incurred and the amount of the liability can be reasonably estimated. With respect to currently pending legal proceedings, we have not established an estimated range of reasonably possible additional losses either because we believe that we have valid defenses to claims asserted against us or the proceeding has not advanced to a stage of discovery that would enable us to establish an estimate. We currently do not expect the outcome of these matters to have a material effect on our consolidated results of operations, financial position or cash flows. Litigation, however, is inherently unpredictable, and it is possible that the ultimate outcome of one or more claims asserted against us could adversely impact our consolidated results of operations, financial position or cash flows. We expense legal costs as incurred.

On January 12, 2015, Plaintiffs David and Katina Spade commenced a purported class action lawsuit in New Jersey state court against Sleep Number alleging that Sleep Number violated New Jersey consumer statutes by failing to provide to purchasing consumers certain disclosures required by the New Jersey Furniture Regulations. It is undisputed that plaintiffs suffered no actual damages or in any way relied upon or were impacted by the alleged omissions. Nonetheless, on behalf of a purported class of New Jersey purchasers of Sleep Number beds and bases, plaintiffs seek to recover a $100 statutory fine for each alleged omission, along with attorneys’ fees and costs. Sleep Number removed the case to the United States District Court for the District of New Jersey, which subsequently granted Sleep Number’s motion to dismiss. Plaintiffs appealed to the United States Court of Appeals for the Third Circuit, which certified two questions of law to the New Jersey Supreme Court relating to whether plaintiffs who have suffered no actual injury may bring claims. The New Jersey Supreme Court accepted the certified questions and on April 16, 2018, ruled in our favor on one of the two questions, holding that a consumer only has standing to bring a claim under the relevant statute if the consumer has been harmed by the defendant's conduct. The Third Circuit has remanded the case to the federal district court for further analysis consistent with the New Jersey Supreme Court’s opinion. As a result, we expect that the federal district court will dismiss any claims that Plaintiffs attempt to pursue consistent with the guidance set forth by the New Jersey Supreme Court.