Note 2 - Revenue: Schedule of geographical revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Application total
Product Application	$ 27,716	$ 37,193
Transferred at Point in Time
Product Application	3,241	2,935
Transferred over Time
Product Application	24,475	34,258
Audio-Visual Systems
Product Application	16,051	22,961
Domes
Product Application	6,963	9,600
Show Content
Product Application	2,416	2,225
Maintenance and Service
Product Application	2,286	2,407
Planetarium Theaters | Application total
Product Application	24,151	31,633
Planetarium Theaters | Transferred at Point in Time
Product Application	3,138	2,935
Planetarium Theaters | Transferred over Time
Product Application	21,013	28,698
Planetarium Theaters | Audio-Visual Systems
Product Application	14,802	21,315
Planetarium Theaters | Domes
Product Application	4,726	5,686
Planetarium Theaters | Show Content
Product Application	2,340	2,225
Planetarium Theaters | Maintenance and Service
Product Application	2,283	2,407
Other Visitor Attractions | Application total
Product Application	3,440	4,538
Other Visitor Attractions | Transferred at Point in Time
Product Application	103	0
Other Visitor Attractions | Transferred over Time
Product Application	3,337	4,538
Other Visitor Attractions | Audio-Visual Systems
Product Application	1,249	1,646
Other Visitor Attractions | Domes
Product Application	2,112	2,892
Other Visitor Attractions | Show Content
Product Application	76	0
Other Visitor Attractions | Maintenance and Service
Product Application	0	0
Architectural Treatments | Application total
Product Application	125	1,022
Architectural Treatments | Transferred at Point in Time
Product Application	0	0
Architectural Treatments | Transferred over Time
Product Application	125	1,022
Architectural Treatments | Audio-Visual Systems
Product Application	0	0
Architectural Treatments | Domes
Product Application	125	1,022
Architectural Treatments | Show Content
Product Application	0	0
Architectural Treatments | Maintenance and Service
Product Application	3	0
North America
Product Application	14,689	25,917
North America | Planetarium Theaters
Product Application	13,376	23,443
North America | Other Visitor Attractions
Product Application	1,188	1,452
North America | Architectural Treatments
Product Application	125	1,022
Europe
Product Application	5,764	3,782
Europe | Planetarium Theaters
Product Application	4,519	2,607
Europe | Other Visitor Attractions
Product Application	1,245	1,175
Europe | Architectural Treatments
Product Application	0	0
Asia
Product Application	4,775	5,988
Asia | Planetarium Theaters
Product Application	3,798	4,077
Asia | Other Visitor Attractions
Product Application	977	1,911
Asia | Architectural Treatments
Product Application	0	0
Other {1}
Product Application	2,488	1,506
Other {1} | Planetarium Theaters
Product Application	2,458	1,506
Other {1} | Other Visitor Attractions
Product Application	30	0
Other {1} | Architectural Treatments
Product Application	$ 0	$ 0