Hi David, Yes you can retiive all documents by passing the docIds in INLIST Operator.
Here is sample code snippet for JAVA SDK.You can do same for all others SDKs as well.
ArrayList<String> docIds = new ArrayList<String>();
docIds.add("Doc Id 1");
docIds.add("Doc Id 2");
docIds.add("Doc Id 3");
Query myQuery = QueryBuilder.build("_id", docIds , Operator.INLIST);
Storage storageObj = storage.findDocumentsByQuery("Your DB",
"Your Collection Name", myQuery );