2. Revenue (Tables)

3 Months Ended

Mar. 29, 2019

Table Text Block Supplement [Abstract]

Schedule of geographical revenues

In the following tables, revenue reported for the periods presented is disaggregated by primary geographical market, major product line, timing of revenue recognition and product application.

Three months ended March 29, 2019
Product Application	Planetarium Theaters	Other Visitor Attractions	Architectural Treatments	Total
Primary geographic area:
North America	$4,179	$215	$76	$4,470
Europe	1,373	316	-	1,689
Asia	485	38	-	523
Other	483	-	-	483
	$6,520	$569	$76	$7,165
Products:
Audio-Visual Systems	$4,396	$151	$-	$4,547
Domes	801	418	76	1,295
Show Content	771	-	-	771
Maintenance and Service	552	-	-	552
	$6,520	$569	$76	$7,165
Timing of revenue recognition:
Goods transferred at point in time	$816	$-	$-	$816
Goods and services transferred over time	5,704	569	76	6,349
	$6,520	$569	$76	$7,165

Three months ended March 30, 2018
Product Application	Planetarium Theaters	Other Visitor Attractions	Architectural Treatments	Total
Primary geographic area:
North America	$3,133	$120	$360	$3,613
Europe	333	11	-	344
Asia	2,456	847	-	3,303
Other	321	-	-	321
	$6,243	$978	$360	$7,581
Products:
Audio-Visual Systems	$3,986	$11	$-	$3,997
Domes	1,375	967	360	2,702
Show Content	326	-	-	326
Maintenance and Service	556	-	-	556
	$6,243	$978	$360	$7,581
Timing of revenue recognition:
Goods transferred at point in time	$481	$-	$-	$481
Goods and services transferred over time	5,762	978	360	7,100
	$6,243	$978	$360	$7,581

Schedule of contract balances

The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers as of March 29, 2019:

	March 29, 2019	December 31, 2018
Receivables reported as accounts receivable, net	$3,794	$3,250
Contract revenue in excess of billings	2,525	3,484
Billings in excess of contract revenue	4,414	5,959

Schedule of changes in the contract assets and the contract liabilities

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

	Contract Assets	Contract Liabilities
Revenue recognized that was included in the contract liability balance at the beginning of the period		$(3,265)
Increases due to amounts billed to customers, excluding amounts recognized as revenue during the period		$  1,720
Transferred to receivables from contract assets recognized at the beginning of the period	$ (1,343)
Increases as a result of revenue recognized, excluding amounts transferred to receivables during the period	$       384

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.

	Remainder of 2019	2020	2021	2022	2023
Sales	$14,233	$535	$256	$54	$50