After-Hours Stock Movers:

WD-40 Co. (NASDAQ: WDFC) declined 2% despite beating EPS estimates for its second quarter and raising full year guidance.

Immucell Corp (NASDAQ: ICCC) gained 10% after issuing solid preliminary first quarter results.

PriceSmart (NASDAQ: PSMT) gained 3.5% after EPS and revenue beat consensus expectations in the second quarter.

Aehr Test Systems (NASDAQ: AEHR) declined 2.8% after it reported revenue that missed estimates in the first quarter.

SMART Global Holdings, Inc. (NASDAQ: SGH) declined 10% after it published second quarter results and issued guidance that disappointed investors.