Commitments and Contingencies Legal Matters The Company is involved in suits and claims in the normal course of business, including without limitation product liability and general liability claims, and claims pending before the Equal Employment Opportunity Commission. On at least a quarterly basis, the Company consults with its legal counsel to ascertain the reasonable likelihood that such claims may result in a loss. As required by ASC Topic 450, Contingencies ("ASC 450"), the Company categorizes the various suits and claims into three categories according to their likelihood for resulting in potential loss: those that are probable, those that are reasonably possible and those that are deemed to be remote. Where losses are deemed to be probable and estimable, accruals are made. Where losses are deemed to be reasonably possible, a range of loss estimates is determined and considered for disclosure. In determining these loss range estimates, the Company considers known values of similar claims and consultation with independent counsel. The Company believes that the aggregate range of loss stemming from the various suits and asserted and unasserted claims which were deemed to be either probable or reasonably possible is not material as of April 30, 2019. Product Warranty The Company estimates outstanding warranty costs based on the historical relationship between warranty claims and revenues. The warranty accrual is reviewed monthly to verify that it properly reflects the remaining obligation based on the anticipated expenditures over the balance of the obligation period. Adjustments are made when actual warranty claim experience differs from estimates. Warranty claims are generally made within two months of the original shipment date. The following is a reconciliation of the Companys warranty liability: APRIL 30 (in thousands) 2019 2018 PRODUCT WARRANTY RESERVE Beginning balance $ 4,045 $ 3,262 Acquisition  119 Accrual for warranties 24,994 21,374 Settlements (24,423 ) (20,710 ) Ending balance at fiscal year end $ 4,616 $ 4,045 Lease Agreements The Company leases certain office buildings, manufacturing buildings, service centers and equipment. Total rental expenses under operating leases amounted to approximately $26.4 million , $17.0 million and $10.9 million , in fiscal years 2019, 2018 and 2017, respectively. Minimum rental commitments as of April 30, 2019, under non-cancellable leases with terms in excess of one year are as follows: FISCAL YEAR OPERATING (in thousands) CAPITAL (in thousands) 2020 $ 17,943 $ 2,456 2021 17,649 1,953 2022 12,435 1,013 2023 10,636 705 2024 9,854 701 2025 (and thereafter) 38,871 166 $ 107,388 $ 6,994 Less amounts representing interest (2% - 6.5%) (349 ) Total obligations under capital leases $ 6,645