The company has two revenue streams: product and services. Services include repair, refurbishment, preventive maintenance and rental of product. Services for the NA/HME and IPG segments include repair of product. Services for the Europe segment include repair, refurbishment and preventive maintenance services. Services for the Asia Pacific segment include rental and repair of product.

The following table disaggregates the company’s revenues by major source and by reportable segment for the three months ended March 31, 2018 and March 31, 2017 (in thousands):



	Three Months Ended March 31, 2018
	Product		Service		Total
Europe	$	128,002	$	3,312	$	131,314
NA/HME	79,571		211		79,782
IPG	14,508		379		14,887
Asia/Pacific	9,945		1,132		11,077
Total	$	232,026	$	5,034	$	237,060
% Split	98%		2%		100%



	Three Months Ended March 31, 2017
	Product		Service		Total
Europe	$	116,790	$	2,718	$	119,508
NA/HME	83,636		626		84,262
IPG	16,238		135		16,373
Asia/Pacific	10,492		1,088		11,580
Total	$	227,156	$	4,567	$	231,723
% Split	98%		2%		100%

The company's revenues are principally related to the sale of products, approximately 98%, with the remaining 2% related to services including repair, refurbishment, preventive maintenance and rental of product. While the company has a significant amount of contract types, the sales split by contract type is estimated as follows: general terms and conditions (35%), large national customers (25%), governments, principally pursuant to tender contracts (15%) and other customers including buying groups and independent customers (25%).

All product and substantially all service revenues are recognized at a point in time. The remaining service revenue, recognized over time, are reflected in the Europe segment and include multiple performance obligations. For such contracts, the company allocates revenue to each performance obligation based on its relative standalone selling price. The company generally determines the standalone selling price based on the expected cost-plus margin methodology.

Revenue is recognized when obligations under the terms of a contract with the customer are satisfied; generally, this occurs with the transfer of control of the company’s products and services. Revenue is measured as the amount of consideration expected to be received in exchange for transferring product or providing services. The amount of consideration received and revenue recognized by the company can vary as a result of variable consideration terms included in the contracts related to customer rebates, cash discounts and return policies. Customer rebates and cash discounts are estimated based on the most likely amount principle and these estimates are based on historical experience and anticipated performance. In addition, customers have the right to return product within the company’s normal terms policy, and as such the company estimates the expected returns based on an analysis of historical experience. The company adjusts its estimate of revenue at the earlier of when the most likely amount of consideration it expects to receive changes or when the consideration becomes fixed. The company generally does not expect that there will be significant changes to its estimates of variable consideration (see “Receivables” and "Accrued Expenses" in the Notes to the Consolidated Financial Statements include elsewhere in this report for more detail).

Depending on the terms of the contract, the company may defer the recognition of a portion of the revenue at the end of a reporting period to align with transfer of control of the company’s products to the customer. In addition, to the extent performance obligations are satisfied over time, the company defers revenue recognition until the performance obligations are satisfied. As of March 31, 2018 and December 31, 2017, the company had deferred revenue of $4,591,000 and $2,770,000, respectively, related to outstanding performance obligations.