Product Sales

We recognize revenue from product sales when the following fundamental criteria are met: (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred, (iii) the price to the customer is fixed or determinable and (iv) collection of the resulting accounts receivable is reasonably assured.

For all sales, we use a binding purchase order or a signed agreement as evidence of an arrangement. Revenue for these product sales is recognized upon delivery to the customer, as all risks and rewards of ownership have been substantively transferred to the customer at that point. For sales to customers who arrange for and manage the shipping process, we recognize revenue upon shipment from our facilities. Shipping and handling costs that are billed to our customers are classified as revenue. The customer's obligation to pay and the payment terms are set at the time of delivery and are not dependent on the subsequent use or resale of our products.

For sales that include multiple deliverables, such as sales of our StemSource® Cell Bank (cell bank), we account for products or services (deliverables) separately rather than as a combined unit. Stem cell banks typically consist of a complex array of equipment, proprietary knowledge, license rights, and services, including one or more StemSource® devices, a cryogenic freezer, measuring and monitoring equipment, and a database patient tracking system. In addition, we typically provide consulting, installation, and training services. Web hosting, technical support and maintenance services are generally provided for a period of up to one year subsequent to the date of sale. FASB authoritative guidance requires an evaluation of these deliverables to determine the appropriate "units of accounting" for purposes of revenue recognition. Each cell bank is customized to provide the best solution for the customer. Depending on customers' needs, all or combination of the following units of accounting will apply to cell bank transactions:

·	initial consulting services;

·	license rights and standard operating procedures;

·	equipment and supplies;

·	installation services;

·	training services;

·	database hosting services;

·	technical support services; and

·	maintenance services.

FASB authoritative guidance establishes a selling price hierarchy for determining the selling price of a deliverable, which is based on: (a) vendor-specific objective evidence ("VSOE"); (b) third-party evidence ("TPE"); or (c) management estimates. This guidance requires arrangement consideration to be allocated at the inception of the arrangement to all deliverables using the relative selling price method. For our cell bank sales, we establish relative selling prices for all deliverables based on vendor-specific quotes for comparable services when available. In the absence of VSOE, we use competitors' products or services considered largely interchangeable with our own or management's best estimate. Revenue allocated to each unit of accounting is calculated and recognized based on the relative selling price of each deliverable. Future services such as web hosting and ongoing maintenance are deferred and recognized into income as the services are provided, generally over one year following the installation of the equipment.

Concentration of Significant Customers

For the three months ended March 31, 2013, one distributor comprised 42% of our revenue recognized for the quarter. Two direct customers, two distributirs and a government agency accounted for 62% of total outstanding accounts receivable as of March 31, 2013.

For the three months ended March 31, 2012, two direct customers comprised 31% of our revenue recognized for the quarter. Two direct customers accounted for 29% of total outstanding accounts receivable as of March 31, 2012.

Product revenues, classified by geographic location, are as follows:

	Three months ended
	March 31, 2013				March 31, 2012
	Product Revenues		% of Total		Product Revenues		% of Total

North America	$	295,000	21	%	$	214,000	14	%
Japan		699,000	50	%		549,000	37	%
Europe		333,000	24	%		352,000	24	%
Other countries		65,000	5	%		366,000	25	%
Total product revenues	$	1,392,000	100	%	$	1,481,000	100	%

Research and Development

We earn revenue for performing tasks under research and development agreements with both commercial enterprises, such as Olympus and Senko, and governmental agencies like the U.S. Department of Health and Human Service's Biomedical Advanced Research and Development Authority (BARDA). Revenue earned under development agreements is classified as either research grant or development revenues depending on the nature of the arrangement. Revenues derived from reimbursement of direct out-of-pocket expenses for research costs associated with government contracts are recorded as government contract and other within development revenues. Government contract revenue is recorded at the gross amount of the reimbursement. The costs associated with these reimbursements are reflected as a component of research and development expense in our statements of operations.

In the third quarter of 2012, we were awarded a contract to develop a new countermeasure for thermal burns valued at up to $106 million with BARDA. The initial base period includes $4.7 million over two years and covers preclinical research and continued development of Cytori's Celution® system to improve cell processing. The additional contract options, if fully executed, cover clinical development through FDA approval under a device-based PMA regulatory pathway. This is a cost reimbursement contract and related government contract revenue was recorded at the gross amount of reimbursement starting in the fourth quarter of 2012.

We received funds from Olympus and Olympus-Cytori, Inc. during 2005 and 2006. We recorded upfront fees totaling $28,311,000 as deferred revenues, related party. In exchange for these proceeds, we agreed to (a) provide Olympus-Cytori, Inc. an exclusive and perpetual license to our Celution® System device technology and certain related intellectual property, and (b) provide future development contributions related to commercializing the Celution® System platform. The license and development services are not separable and as a result the recognition of this deferred amount as revenue requires achievement of service related milestones, under a proportional performance methodology. If and as such revenues are recognized, deferred revenue will be decreased. Proportional performance methodology was elected due to the nature of our development obligations and efforts in support of the Joint Venture ("JV"), including product development activities and regulatory efforts to support the commercialization of the JV products. The application of this methodology uses the achievement of R&D milestones as outputs of value to the JV. We received up-front, non-refundable payments in connection with these development obligations, which we have broken down into specific R&D milestones that are definable and substantive in nature, and which will result in value to the JV when achieved. As our research and development efforts progress, we periodically evaluate, and modify if necessary, the milestone points in our proportional performance model to ensure that revenue recognition accurately reflects our best estimate of substantive value deliverable to the JV. Revenue will be recognized as the above mentioned R&D milestones are completed. Of the amounts received and deferred, we recognized the last remaining development revenue of $638,000 during the three months ended March 31, 2013 as a result of the the United States Court of Appeals upholding the FDA's previous determination that our cell processing devices were not substantially equivalent to the cited predicate devices. The recognition of revenue associated with this event reflects the completion of our efforts expended to use commercially reasonable efforts to obtain device regulatory approvals in the United States as it pertains to the 501(k) pathway. There was no development revenue recognized during the three months ended March 31, 2012. All related development costs are expensed as incurred and are included in research and development expense on our statements of operations. To date under the contract, of the $28,311,000 originally deferred, all deferred amounts have been recognized as of March 31, 2013.

Refer to Note 14 for discussion about arrangement with Senko.