RSUs are promises of company stock that can be claimed at a future date. They are significantly different from stock options, where executives buy shares from the company at a discounted price. RSUs are outright awards that don't require the executive to pony up any money.
RSUs and options have the same purpose: to encourage executives to stay in their jobs, while working to boost the company's stock price.
RSUs are just one of several components of annual pay for senior executives. In addition to cash, they get stock options. I expect the company will disclose the options grants fairly soon.
Last year, Dubow got paid a total $4.7 million. Of that, an estimated $1.3 million was in RSUs, and $585,000 was in conventional stock options. (Pay last year for Dubow and other highest-paid executives.)
The chart, below, lists the RSUs granted to executives, based on today's filings. You may also download a copy of the chart. The board of directors granted all the RSUs last Friday. They all may be redeemed on the same December 2014 date. (List of all SEC filings.)