NOTE 15  COMMITMENTS AND CONTINGENCIES Environmental Compliance and Remediation Liabilities The Companys operations and products are subject to a variety of environmental laws and regulations in the jurisdictions in which the Company operates and sells products governing, among other things, air emissions, wastewater discharges, the use, handling and disposal of hazardous materials, soil and groundwater contamination, employee health and safety, and product content, performance and packaging. Certain environmental laws may impose the entire cost or a portion of the cost of investigating and cleaning up a contaminated site, regardless of fault, upon any one or more of a number of parties, including the current or previous owners or operators of the site. These environmental laws also impose liability on any person who arranges for the disposal or treatment of hazardous substances at a contaminated site. Third parties may also make claims against owners or operators of sites and users of disposal sites for personal injuries and property damage associated with releases of hazardous substances from those sites. Warranty Liability The Company warrants its products for terms that range from one to five years. In certain contracts, the Company has recourse provisions for items that would enable recovery from third parties for amounts paid to customers under warranty provisions. As of March 31, 2020 and 2019, estimated product warranty liability was $118 and $218, respectively, and is recorded within accrued liabilities in the Companys condensed consolidated balance sheets. The changes in the carrying amount of the Companys total product warranty liability for the three months ended March 31, 2020 and 2019 were as follows: For the Three Months Ended March 31, 2020 2019 Balance, beginning of period $ 163 $ 226 Reduction of warranty reserve (25) (19) Other adjustments (20) 11 Balance, end of period $ 118 $ 218 Allowance for Doubtful Accounts Based upon past experience and judgment, the Company establishes an allowance for doubtful accounts with respect to accounts receivable. The Companys standard allowance estimation methodology considers a number of factors that, based on its collections experience, the Company believes will have an impact on its credit risk and the collectability of its accounts receivable. These factors include individual customer circumstances, history with the Company, the length of the time period during which the account receivable has been past due and other relevant criteria. The Company monitors its collections and write-off experience to assess whether or not adjustments to its allowance estimates are necessary. Changes in trends in any of the factors that the Company believes may impact the collectability of its accounts receivable, as noted above, or modifications to its credit standards, collection practices and other related policies may impact the Companys allowance for doubtful accounts and its financial results. The activity in the accounts receivable allowance liability for the three months ended March 31, 2020 and 2019 consisted of the following: For the Three Months Ended March 31, 2020 2019 Balance at beginning of period $ 127 $ 190 Bad debt expense 55  Write-offs (19)  Other adjustments (7) (14) Balance at end of period $ 156 $ 176 Collateral In select instances, the Company has pledged specific inventory and machinery and equipment assets to serve as collateral on related payable or financing obligations. Liquidated Damages In certain customer contracts, the Company has agreed to pay liquidated damages in the event of qualifying delivery or production delays. These damages are typically limited to a specific percentage of the value of the product in question and/or are dependent on actual losses sustained by the customer. The Company does not believe that this potential exposure will have a material adverse effect on the Companys consolidated financial position or results of operations. There was no reserve for liquidated damages as of March 31, 2020 or December 31, 2019.