Revenue Recognition The Company recognizes revenue when persuasive evidence of an arrangement exists, services have been rendered or delivery has occurred, the price to the buyer is fixed or determinable and collectability is reasonably assured. Product Revenue . The Company recognizes product revenue from selling manufactured ZADAXIN product at the time of delivery. Sales of ZADAXIN to Sinopharm are recognized upon arrival of a shipment to its destination, which marks the point when title and risk of loss to product are transferred. The Company also earns product revenue from purchasing medical products from pharmaceutical companies and selling them directly to importers or distributors. The Company recognizes revenue related to these products based on the sell-in method, when the medical products have been delivered to the importers or distributors. Payments by the importing agents and distributors are not contingent upon sale to the end user by the importing agents or distributors. Effective January 1, 2016, the Companys new contractual arrangement with its China importer and distributor for ZADAXIN, Sinopharm, is resulting in the later recognition (relative to practices prevailing under the old contractual arrangement through December 31, 2015) of a portion of the Companys revenue due from Sinopharm related to situations where the provincial tender price is greater relative to a reference (baseline) tender price. The tender price is the ultimate retail end price approved by provincial authorities. There is a price mechanism in the new contractual arrangement whereby the customer is invoiced at a lower base price relative to that prevailing in the previous agreement. The lower base price (as well as estimated price compensation payable due to the distributor for situations where the provincial tender price is lower than the reference (baseline) tender price) is recorded as revenue at the time the sale is completed upon arrival at destination. To date, there are no situations where a provincial tender price