North American Scientific Inc. has six months to regain compliance or else face delisting from The NASDAQ Stock Market. The Chatsworth-based company was notified Aug. 20 that it failed to meet the requirement of having its common share price close above $1 for a 30 day period. Throughout the past year, North American, which makes radiation therapy devices, has gone in and out of compliance with NASDAQ’s marketplace rules on multiple occasions. North American has until Feb. 17 to regain compliance and can appeal a move to de-list its common stock to a NASDAQ Listing Qualifications Panel.