I took a quick look at that section and it isn't very convincing. The now gone CFO started the period with 7,270 shares and ended the period with 7,270 shares. What happened was that he exercised stock options and converted them to cash. This is extremely common and doesn't reflect any particular issue relating to confidence in the underlying stock. I personally frequently convert my NQSOs to cash too. As noted in the actual filing: "The stock option exercise and sales reported on this Form 4 were effected pursuant to a pre-determined Rule 10b5-1 trading plan adopted by the reporting person on March 3, 2014 and amended on March 3, 2015. The reporting person adopted the trading plan to periodically exercise long held stock options that are expiring in September 2015 and April 2016." Meaning that they set up a plan to dispose of the shares in early 2014 and it was just exercised on time. Although the person didn't link to the most clear EDGAR filing, it does appear that Jerome liquidated his position in the company on his way out. The VP of Manufacturing looks like a guy who never owned much stock and just cashed in his options. The filing indicates that the options were part of his compensation plan -- when hired he received 272k in base pay and $5 million in stock options. It would be crazy for someone earning 272k to sit with $5m in stock options in a single company.
The link for Struebel is a joke. He is described as "steadily dumping" when he started the period with 134,902 shares and ended the period with 134,902. He simply traded off 10,000 shares, reflecting a small portion of his holdings. He too is paid a reasonably modest salary (249k) with nearly $17 million in stocks and options.