The following table provides information about disaggregated revenue by primary geographical area and includes a reconciliation of the disaggregated revenue with reportable segments (in thousands):

	Three Months Ended March 31, 2020						Three Months Ended March 31, 2019
	Partner Solutions		Edge to Cloud		Total		Partner Solutions		Edge to Cloud		Total
Primary geographic area:
North America	$	13,171	$	605	$	13,776	$	12,727	$	1,801	$	14,528
Europe		426		213		639		320		141		461
Asia		2,308		6		2,314		54		53		107
Total	$	15,905	$	824	$	16,729	$	13,101	$	1,995	$	15,096

We receive payments from customers based upon contractual billing schedules; accounts receivable is recorded when the right to consideration becomes unconditional. Contract assets include amounts related to our contractual right to consideration for completed performance obligations not yet invoiced and deferred contract acquisition costs, which are amortized over time as the associated revenue is recognized. Contract liabilities, presented as deferred revenue on our condensed consolidated balance sheets, include payments received in advance of performance under the contract and are realized when the associated revenue is recognized. We had no asset impairment charges related to contract assets for each of the three months ended March 31, 2020 and 2019.

Significant changes in the contract assets and the deferred revenue balances during the three months ended March 31, 2020 were as follows (in thousands):

	Three Months Ended March 31, 2020
	Contract Assets		Deferred Revenue
Revenue recognized that was included in deferred revenue at December 31, 2019	$	—	$	278
Transferred to receivables from contract assets recognized at December 31, 2019		15		—

We capitalize contract acquisition costs for contracts with a life exceeding one year. Amortization of contract acquisition costs was $35,000 and $7,000 for the three months ended March 31, 2020 and 2019, respectively. There were no asset impairment charges for contract acquisition costs for any of the periods noted above.

The following table includes estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied or partially unsatisfied at the end of the reporting period (in thousands). The estimated revenue does not include contracts with original durations of one year or less, amounts of variable consideration attributable to royalties, or contract renewals that were unexercised as of March 31, 2020:

Remainder of

2020

2021

After 2021

Partner Solutions

Edge to Cloud

1,352

2,268

274

We apply a practical expedient and fully expense contract acquisition costs, such as sales commissions, as incurred because the amortization period is less than one year. We record these costs within selling, general and administrative expenses.