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The remainder of the shares vest in two equal installments on the last day of each of the Issuer's third and fourth quarters of fiscal 2019 provided the recipient continues to serve as a director of the Issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents partial vesting of a restricted stock unit award on June 1, 2019 and delivery of shares to the reporting person pursuant to the terms of a restricted stock unit award agreement dated May 16, 2019.  The remainder of the shares vest in two equal installments on the last day of each of the Issuer's third and fourth quarters of fiscal 2019 provided the recipient continues to serve as a director of the Issuer."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Represents partial vesting of a restricted stock unit award on June 1, 2019 and delivery of shares to the reporting person pursuant to the terms of a restricted stock unit award agreement dated May 16, 2019.  The remainder of the shares vest in two equal installments on the last day of each of the Issuer's third and fourth quarters of fiscal 2019 provided the recipient continues to serve as a director of the Issuer."}],"balance_after":929,"derivative":{"exercise_price":0,"expiration_date":"2020-01-31","underlying":"Common Stock","underlying_shares":929},"source":{"system":"sec-edgar","filing":"0000886346-19-000091","document":"wf-form4_155956547454012.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/886346/000088634619000091/wf-form4_155956547454012.xml","form_type":"4"}},{"id":3505597,"issuer":{"id":4135,"kind":"organization","name":"KADANT INC","symbol":"KAI"},"owners":[{"id":32394,"kind":"person","name":"ALBERTINE JOHN M","position":1,"cik":"0001015997","reported_name":"ALBERTINE JOHN M","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2019-06-03T12:38:09.000Z","date":"2019-06-01","kind":"exercise","acquired":true,"shares":929,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Represents partial vesting of a restricted stock unit award on June 1, 2019 and delivery of shares to the reporting person pursuant to the terms of a restricted stock unit award agreement dated May 16, 2019.  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