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Segment, Geographic and Customer Concentration Information - Summary of segment operating results and reconciliations (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Revenue: |  |  |  |
Revenues | $ 11,519 | $ 6,803 | $ 12,602 | $ 11,692
Depreciation and amortization | 1,929 | 1,712 | 2,316 | 1,494
Operating profit (loss) | (56,481) | (44,968) | (62,615) | (64,229)
Other significant items: |  |  |  |
Segment assets | 191,453 | 72,655 | 51,864 | 28,202
Inventory | 2,921 | 4,742 | 4,002 | 2,926
External Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 11,519 | 6,803 | 12,602 | 11,692
Internal Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 0 | 0 | 0 | 0
Operating Segments [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 14,702 | 8,987 | 15,551 | 15,079
Depreciation and amortization | 1,929 | 1,712 | 2,316 | 1,494
Operating profit (loss) | (56,481) | (44,968) | (62,615) | (64,229)
Other significant items: |  |  |  |
Segment assets | 194,757 | 75,434 | 54,389 | 30,813
Inventory | 2,921 | 4,742 | 4,002 | 2,926
Operating Segments [Member] | External Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 11,519 | 6,803 | 12,602 | 11,692
Operating Segments [Member] | Internal Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 3,183 | 2,184 | 2,949 | 3,387
Intersegment Eliminations [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | (3,183) | (2,184) | (2,949) | (3,387)
Depreciation and amortization | 0 | 0 | 0 | 0
Operating profit (loss) | 0 | 0 | 0 | 0
Other significant items: |  |  |  |
Segment assets | (3,304) | (2,779) | (2,525) | (2,611)
Inventory | 0 | 0 | 0 | 0
Intersegment Eliminations [Member] | External Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 0 | 0 | 0 | 0
Intersegment Eliminations [Member] | Internal Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | (3,183) | (2,184) | (2,949) | (3,387)
Other Component Sales [Member] | Operating Segments [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 4,476 | 4,614 | 5,885 | 7,843
Depreciation and amortization | 104 | 135 | 181 | 159
Operating profit (loss) | 192 | 267 | 259 | (384)
Other significant items: |  |  |  |
Segment assets | 2,979 | 2,315 | 2,218 | 4,244
Inventory | 9 | 0 | 0 | 0
Other Component Sales [Member] | Operating Segments [Member] | External Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 1,932 | 2,430 | 2,936 | 4,456
Other Component Sales [Member] | Operating Segments [Member] | Internal Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 2,544 | 2,184 | 2,949 | 3,387
Autonomy Solutions [Member] | Operating Segments [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 10,226 | 4,373 | 9,666 | 7,236
Depreciation and amortization | 1,825 | 1,577 | 2,135 | 1,335
Operating profit (loss) | (56,673) | (45,235) | (62,874) | (63,845)
Other significant items: |  |  |  |
Segment assets | 191,778 | 73,119 | 52,171 | 26,569
Inventory | 2,912 | 4,742 | 4,002 | 2,926
Autonomy Solutions [Member] | Operating Segments [Member] | External Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | 9,587 | 4,373 | 9,666 | 7,236
Autonomy Solutions [Member] | Operating Segments [Member] | Internal Customers [Member] |  |  |  |
Revenue: |  |  |  |
Revenues | $ 639 | $ 0 | $ 0 | $ 0

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