Note 2. Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Table Text Block Supplement [Abstract]

Schedule of geographical revenues

In the following table, revenue reported for the year ended December 31, 2018 under Topic 606 is disaggregated by primary geographical market, major product line, timing of revenue recognition and product application.

Product Application	Planetarium Theaters	Other Visitor Attractions	Architectural Treatments	Total
Primary Geographic Area:
North America	$  23,443	$ 1,452	$ 1,022	$ 25,917
Europe	2,607	1,175	-	3,782
Asia	4,077	1,911	-	5,988
Other	1,506	-	-	1,506
	$ 31,633	$ 4,538	$ 1,022	$ 37,193
Products:
Audio-Visual Systems	$ 21,315	$ 1,646	$         -	$ 22,961
Domes	5,686	2,892	1,022	9,600
Show Content	2,225	-	-	2,225
Maintenance and Service	2,407	-	-	2,407
	$ 31,633	$ 4,538	$ 1,022	$ 37,193
Timing of revenue recognition:
Goods transferred at point in time	$   2,935	$         -	$         -	$   2,935
Goods and services transferred over time	28,698	4,538	1,022	34,258
	$ 31,633	$ 4,538	$ 1,022	$ 37,193

Schedule of contract balances

The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers as of December 31, 2018 and January 1, 2018:

	December 31, 2018	January 1, 2018
Receivables reported as accounts receivable, net	$ 3,250	$ 3,794
Contract revenue in excess of billings	3,484	3,517
Billings in excess of contract revenue	5,959	6,265

Schedule of changes in the contract assets and the contract liabilities

Significant changes in the contract assets and the contract liabilities balances during the year are as follows:

	Contract Assets	Contract Liabilities
Revenue recognized that was included in the contract liability balance at the beginning of the year		$ (4,697)
Increases due to amounts billed to customers, excluding amounts recognized as revenue during the year		$  4,391
Transferred to receivables from contract assets recognized at the beginning of the year	$ (3,404)
Increases as a result of revenue recognized, excluding amounts transferred to receivables during the year	$  3,371

Schedule of backlog of performance obligations

The following table includes estimated revenue expected to be recognized and recorded as sales in the future from the backlog of performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period.

	2019	2020	2021	2022	2023
Sales	$15,881	$678	$546	$170	$91