On January 1, 2017, we adopted Topic 606, applying the modified retrospective method to all contracts that were not completed as of that date. We recorded an increase to opening equity of $404,000 as of January 1, 2017 due to the cumulative impact of adopting Topic 606. There was no tax effect on the cumulative impact adjustment due to the valuation allowance on our net deferred tax asset.

The following table provides information about disaggregated revenue by primary geographical market, major product line and timing of revenue recognition, and includes a reconciliation of the disaggregated revenue with reportable segments (in thousands):

	Year Ended December 31, 2018
	Third-Party Software		Proprietary Software		Total Software		Professional Engineering Service		Total
Primary geographical markets:
North America	$	58,523	$	3,305	$	61,828	$	7,260	$	69,088
Europe		2,239		115		2,354		701		3,055
Asia		397		534		931		340		1,271
Total	$	61,159	$	3,954	$	65,113	$	8,301	$	73,414

Major products/services lines:
Third-party software	$	61,159	$	-	$	61,159	$	-	$	61,159
Proprietary software		-		3,954		3,954		-		3,954
Professional engineering services		-		-		-		8,301		8,301
Total	$	61,159	$	3,954	$	65,113	$	8,301	$	73,414

Timing of revenue recognition:
Transferred at a point in time	$	61,035	$	2,967	$	64,002	$	1,592	$	65,594
Transferred over time		124		987		1,111		6,709		7,820
Total	$	61,159	$	3,954	$	65,113	$	8,301	$	73,414

The following table provides information about receivables, contract assets and contract liabilities from contracts with customers (in thousands):

We receive payments from customers based upon contractual billing schedules. Accounts receivable are recorded when the right to consideration becomes unconditional. Contract assets include amounts related to our contractual right to consideration for completed performance objectives not yet invoiced and deferred contract acquisition costs, which are amortized along with the associated revenue. Contract liabilities include payments received in advance of performance under the contract and are realized with the associated revenue recognized under the contract. We had no asset impairment charges related to contract assets in the period.

Significant changes in contract assets and liabilities balances were as follows (in thousands):

In connection with the adoption of Topic 606, we are required to capitalize certain contract acquisition costs consisting primarily of commissions paid when contracts are signed. As of January 1, 2017, the date we adopted Topic 606, we capitalized $292,000 in contract acquisition costs related to contracts that were not completed. For contracts that have a duration of less than one year, we follow a Topic 606 practical expedient and expense these costs when incurred. For contracts with lives exceeding one year, as is more common with our DataV software bookings, we record these costs in proportion to each completed contract performance obligation. During the years ended December 31, 2018 and December 31, 2017, we recorded $128,000 and $168,000 in amortization of capitalized contract acquisition costs, respectively. There were no impairment losses recorded related to costs capitalized. Contract acquisition costs capitalized during the years ended December 31, 2018 and December 31, 2017 were $748,000 and $87,000, respectively.

We did not recognize any revenue from performance obligations satisfied in previous periods.

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 December 31, 2018.

We generally expense sales commissions when incurred because the amortization period would have been less than one year. We record these costs within selling, general and administrative expenses.