Revenue Recognition(Tables)

3 Months Ended

Mar. 31, 2018

Revenue From Contract With Customer [Abstract]

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

	Three Months Ended March 31, 2018								Three Months Ended March 31, 2017
	Third-Party Software		Proprietary Software		Professional Engineering Service		Total		Third-Party Software		Proprietary Software		Professional Engineering Service		Total
Primary geographical markets:
North America	$	15,119	$	1,683	$	2,487	$	19,289	$	16,296	$	2,645	$	2,829	$	21,770
Europe		593		100		246		939		424		—		398		822
Asia		352		12		86		450		77		9		163		249
Total	$	16,064	$	1,795	$	2,819	$	20,678	$	16,797	$	2,654	$	3,390	$	22,841

Schedule of Significant Changes in Contract Assets and Liabilities

Significant changes in the contract assets and the contract liabilities balances during the periods are as follows (in thousands):

	Three Months Ended March 31, 2018
	Contract Assets		Contract Liabilities⁽¹⁾
Revenue recognized that was included in the contract liability (deferred revenue) at December 31, 2017	$	—	$	2,214
Transferred to receivables from contract assets recognized at December 31, 2017		238		—
⁽¹⁾ Comprised of deferred revenue

Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations

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. The estimated revenues do not include contracts with original durations of one year or less, amounts of variable consideration attributable to royalties, or contract renewals that are unexercised as of March 31, 2018 (in thousands):

	Remainder of 2018		2019		2020		2021
Third-party software	$	89	$	50	$	14	$	—
Proprietary software		1,138		1,133		820		114
Professional engineering services		230		—		—		—