"ideas expanding" is a correct and usable phrase in written English.
It can be used to refer to the development of thoughts or concepts. For example, "The professor encouraged his students to engage in creative problem solving, allowing their ideas to expand beyond what was in the textbook."
He built on Mr. Fifer's ideas, expanding "process demonstrations" and educational residencies considerably.
One morning as I ride with Williams, he talks about business ideas — expanding routes to carry hipsters places where subways are inconvenient, branding vans to build a presence, putting advertising on the vans to increase profits.
The attraction of reducing the skill mix is that it sounds like a way of saving money, while the other ideas – expanding the GP workforce by making it more attractive to be a GP, and getting many more hospital staff (and GPs and their staff) to work more unsocial hours, would cost serious money.
We pretty quickly had a list of associated images and ideas: expanding water, floods and flood myths, diving bells and breathing, global warming and the slow, imperceptible failure of large systems that readjust themselves by sudden and dramatic crashes, etc.
Share this small idea with friends and family, brainstorm new ideas, expanding the one idea into a great story.
Other political ideas expand the universe even further.
The revenue ideas are dying one by one, while the spending ideas expand.
As computational resources expand, the opportunities for exploitation of the grand ideas expand as well.
"Crowdsourcing" ideas expands our range of good and creative options.
What about the N.C.A.A.'s "borrowing" the N.I.T. idea, expanding it nationwide, then forcing 64 selected colleges to participate only in its own cash cow?
Soon, the idea expanded to include D.C. boxers.
