After reading what you intend to do with the scanner, I think you can do a pretty job scanning documents using a phone camera with good quality instead. Besides, it won't be difficult to carry around - it'll just be in your pocket
I, for instance, scan documents using my phone, which fortunately, has 20 megapixel. I use the software called Camscanner which works well on Android. It allows converting your scanning into PDF and other formats for safe keeping.
Of course you don't need a 20 megapixel camera to scan documents. Somewhere 8 to 12 megapixel is enough to get HD quality of documents, if that's what you're aiming for.
Though not scanning, I could get some nice pictures with just with my phone, just to show that, with careful orientation, you can scan, even better documents with your phone
Just my suggestion.
On Wednesday, November 26, 2014, Ravishankar Ayyakkannu <email@example.com
We will take it forward from there ASAP.