0000728385 2026-05-01 2026-05-01 0000728385 true NA 8-K/A 2026-05-01 BIRCHTECH CORP. DE 000-33067 87-0398271 1810 Jester Drive Corsicana TX 75109 614 505-6115 false false false false Common Stock, par value $0.001 per share BCHT NYSE false