v5.31.4

Fixed

• Empty income statement on 16-week-quarter filers (CAVA, RRGB) — quarterly period selection bucketed durations as 80-100 days or 150-285 days, leaving CAVA's 111-day Q1 in a dead zone. The selector now anchors on filing.period_of_report. (#822, reporter @mkdeak)

• TenK.business silently returned Part II MD&A content on GS's 2025 10-K — the cross-Part lookup happily returned a mislabeled part_ii_item_1 key. Item lookup is now constrained to the SEC-canonical Part per item. (#821, reporter @FlorinAndrei)

• Viewer ConceptRow.numeric_value returned wrong values on ADI 2019 and ADSK 2019 10-Ks — primary_period is now form-aware (annual forms prefer the longest \"X Months Ended\" duration), and class=\"th\" spacer cells are dropped from body rows so column positions align. (#818, reporter @mpreiss9)

• Filing.search() raised a bare AssertionError on pre-2001 SGML/text filings — replaced with a descriptive ValueError pointing users at filing.text(). (#819, reporter @shenker)

Added

• 10-K section patterns for Item 1B (Unresolved Staff Comments) and Item 1C (Cybersecurity) — closes the gap left when the same SEC rulemaking added 8-K Item 1.05 and 20-F Item 16K patterns. (#813, contributor @HonzaCuhel)