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Commitments and Contingencies | 12 Months Ended
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Apr. 30, 2017
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | 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, 2017. 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 Company’s warranty liability:
| APRIL 30
(in thousands) | 2017 |  | 2016
PRODUCT WARRANTY RESERVE |  |  |
Beginning balance | $ | 2,926 |  |  | $ | 2,643 |
Accrual for warranties | 18,552 |  |  | 16,279 |
Settlements | (18,216 | ) |  | (15,996 | )
Ending balance at fiscal year end | $ | 3,262 |  |  | $ | 2,926 |
Lease Agreements The Company leases certain office buildings, manufacturing buildings, service centers and equipment. Total rental expenses under operating leases amounted to approximately $10.9 million, $9.8 million and $8.8 million, in fiscal years 2017, 2016 and 2015, respectively. Minimum rental commitments as of April 30, 2017, under noncancelable leases with terms in excess of one year are as follows:
FISCAL YEAR | OPERATING (in thousands) |  | CAPITAL (in thousands)
2018 | $ | 2,884 |  |  | $ | 1,796 |
2019 | 1,258 |  |  | 1,401 |
2020 | 937 |  |  | 1,167 |
2021 | 602 |  |  | 863 |
2022 | 119 |  |  | 672 |
2023 (and thereafter) | 16 |  |  | 1,490 |
| $ | 5,816 |  |  | $ | 7,389 |
Less amounts representing interest (2% - 6.5%) |  |  | (541 | )
Total obligations under capital leases |  |  | $ | 6,848 |
Related Parties During fiscal 1985, prior to becoming a publicly held corporation, the Company entered into an agreement with a partnership which includes certain former executive officers and current significant shareholders of the Company, to lease the Company’s headquarters building which was constructed and is owned by the partnership. The Company has subsequently renewed this lease in accordance with Company policy and procedures which includes approval by the Board of Directors. In considering the renewal of this lease, the Company assesses the lease terms in relation to market terms for comparable properties. Based upon this review, the Company believes that the rent under the lease is in line with market rates that could be obtained at arm’s length from unaffiliated third parties. As of April 30, 2017, the Company is in the second year of the latest five-year renewal period, which expires in 2021. In April 2017, the Company gave notice that it would be terminating the lease on May 31, 2018. Under this agreement, rental expense was $0.5 million, $0.5 million and $0.5 million, in fiscal years 2017, 2016 and 2015, respectively. Rent due during the remaining term of the lease is approximately $0.5 million (included in the preceding table).

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- Definition The entire disclosure for commitments and contingencies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=73718637&loc=d3e25287-109308 + Details
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