Revenue Recognition

The Company’s revenues primarily result from the sale of manufactured products and reflect the consideration to which the Company expects to be entitled. The Company records revenue based on a five-step model in accordance with ASC 606. For its customer contracts, the Company identifies the performance obligations, determines the transaction price, allocates the contract transaction price to the performance obligations, and recognizes the revenue when (or as) control of goods or services is transferred to the customer.

For product sales, each purchase order, along with any existing governing customer agreements where applicable, represents a contract with a customer and each product sold to a customer typically represents a distinct performance obligation. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The majority of the Company’s product sales are subject to ExWorks delivery terms (as defined in Incoterms 2010) and revenue is recorded at the point in time when products are picked up by the customer's freight forwarder, as the Company has determined that this is the point in time that control transfers to the customer. Certain customers have shipping terms where control does not transfer until the product is delivered to the customer’s location. For these transactions, revenue is recognized at the time that the product is delivered to the customer’s location.

Provisions for customer volume discounts, product returns, rebates and allowances are variable consideration and are estimated and recorded as a reduction of revenue in the same period the related product revenue is recorded. Such provisions are calculated using historical averages and adjusted for any expected changes due to current business conditions, and are not material.

The Company provides assurance-type warranties on all product sales for terms ranging from one to eight years. The Company accrues for the estimated warranty costs at the time of sale based on historical warranty experience plus any known or expected changes in warranty exposure.

The Company records revenue net of sales tax, value added tax, excise tax and other taxes collected concurrent with revenue-producing activities. The Company has elected to recognize the cost for freight and shipping when control over the products sold passes to customers and revenue is recognized.

The Company’s contracts with customers do not typically include extended payment terms. Payment terms vary by contract type and type of customer and generally range from 30 to 90 days from delivery.

A portion of the Company’s revenue is derived from sales to distributors which represented approximately 13% and 10% of revenue for the three months ended March 31, 2019 and 2018, respectively.

The Company also derives some revenue from non-product sales. When the Company’s contracts with customers require specialized services or other deliverables that are not separately identifiable from other promises in the contracts and, therefore, not distinct, then the non-distinct obligations are accounted for as a single performance obligation. For performance obligations that the Company satisfies over time, which represented 2% and 6% of revenue for the three months ended March 31, 2019 and 2018, respectively, revenue is recognized by consistently applying a method of measuring progress toward complete satisfaction of that performance obligation. The Company uses the input method to recognize revenue on the basis of the Company’s efforts or inputs to the satisfaction of a performance obligation relative to the total inputs expected to satisfy that performance obligation. The Company uses the actual costs incurred relative to the total estimated costs to determine its progress towards contract completion.

The following tables disaggregate the Company’s revenue by shipment destination:



	Three Months Ended March 31,
Region:	2019		2018
Americas	$	2,879	$	4,744
Asia Pacific	6,860		8,026
Europe	5,699		10,232
Total	$	15,438	$	23,002

The Company does not have material contract assets since revenue is recognized as control of goods are transferred or as services are performed. As of March 31, 2019 and December 31, 2018, the Company’s contract liabilities primarily relate to cash received under a licensing and services agreement, amounts received in advance from a customer in connection with a specialized services contract for which revenue is recognized over time, and customer advances. Changes in the Company’s contract liabilities, which are included in “deferred revenue and other current liabilities” in the Company’s condensed consolidated balance sheets, are as follows:



	Three Months Ended March 31,
	2019			2018
Beginning balance	$	3,479		$	5,234
Impact of adoption of ASC 606	—			(518		)
Increases due to cash received from customers	908			1,267
Decreases due to recognition of revenue	(489		)	(1,461		)
Other changes	(265		)	(4		)
Ending balance of contract liabilities	$	3,633		$	4,518

The Company has two uncompleted, non-product sale contracts with original durations of greater than one year. The transaction price allocated to performance obligations unsatisfied at March 31, 2019 in connection with these contracts is $3.8 million. Of this amount, $0.5 million relates to a specialized services contract which is recognized over time and is expected to be completed within one year. The other $3.3 million relates to a licensing and services contract, for which the estimate of the transaction price allocated to unsatisfied performance obligations was adjusted in the third quarter of 2018; the adjustment did not have a material impact on our financial statements as it primarily pertained to unsatisfied performance obligations. Revenue related to the licensing and services contract is expected to be recognized at a point in time when certain conditions are met which are dependent on the customer, and therefore the timing of recognition cannot currently be estimated. The licensing and services arrangement also provides for royalties for product sales that use the licensed intellectual property, which will be recognized at the time the related sales occur.