Not to be argumentative but I am an accountant and both in college and my time at a CPA Firm the discussion of buying another company came up quite a bit. While many factors do play into it, the price usually took into account X number of year's worth of income that is determined by a rate to get the new company's discounted future cash flows from the business (fair market value of the future cash.) Of-course, the assets on hand plus any patents & trademarks along with debts and all play a part as well...its a complicated equation. lol
From my experience the price shouldn't be basically 1 year's worth of Revenue. It could be that there is quite a bit of debt or the company has a lot of expenses or the current owners simply wanted out...a lot does go into it I just would have expected more than the $11mil for a company with $10mil in Revenue BUT that is the only info given and there are alot of other factors at work here.
Hopefully the new company will continue to make awesome equipment. Change of ownership is not always a bad thing.