Qualys (NASDAQ: QLYS ) shares tumbled 17.12% to touch a new 52-week low of $10.54. Qualys issued downbeat Q1 forecast. PHAZAR CORP (NASDAQ: ANTP ) shares fell 9.45% to touch a new 52-week low of $1.63. PHAZAR CORP reported a drop in its FQ2 consolidated sales. MELA Sciences (NASDAQ: