Note 2 - Revenue (Tables)

12 Months Ended

Dec. 31, 2019

Table Text Block Supplement [Abstract]

Schedule of geographical revenues

Revenue for the year ended December 31, 2019:

Product Application	Planetarium Theaters		Other Visitor Attractions		Architectural Treatments		Total
Primary Geographic Area:
North America	$	13,376	$	1,188	$	125	$	14,689
Europe		4,519		1,245		-		5,764
Asia		3,798		977		-		4,775
Other		2,458		30		-		2,488
	$	24,151	$	3,440	$	125	$	27,716
Products:
Audio-Visual Systems	$	14,802	$	1,249	$	-	$	16,051
Domes		4,726		2,112		125		6,963
Show Content		2,340		76		-		2,416
Maintenance and Service		2,283		3		-		2,286
	$	24,151	$	3,440	$	125	$	27,716
Timing of revenue recognition:
Goods transferred at point in time	$	3,138	$	103	$	-	$	3,241
Goods and services transferred over time		21,013		3,337		125		24,475
	$	24,151	$	3,440	$	125	$	27,716

Revenue for the year ended December 31, 2018:

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, 2019 and 2018:

	December 31, 2019	December 31, 2018
Receivables reported as accounts receivable, net	$ 4,957	$ 3,250
Contract revenue in excess of billings	2,655	3,484
Billings in excess of contract revenue	5,428	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 year are as follows:

	Contract Assets	Contract Liabilities
Revenue recognized that was included in the contract liability balance at the beginning of the period		$ (4,478)
Increases due to amounts billed to customers, excluding amounts recognized as revenue during the period		$ 3,947
Transferred to receivables from contract assets recognized at the beginning of the period	$ (2,994)
Increases as a result of revenue recognized, excluding amounts transferred to receivables during the period	$ 2,165

Schedule of backlog of performance obligations

Backlog of Remaining Customer 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.

	2020	2021	2022	2023	2024
Sales	$ 16,018	$ 3,381	$ 202	$ 22	$ 85