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v3.20.1

Restructuring Activities - Charges and Net Assets (Details) - USD ($) $ in Thousands |  | 3 Months Ended |
--- | --- | --- | ---
Jan. 23, 2019 | Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Restructuring Cost and Reserve [Line Items] |  |  |  |
Total Revenues |  | $ 3,778 | $ 10,155 |
Net loss |  | (2,567) | (1,289) |
Total assets |  | 28,921 |  | $ 32,224
Liabilities |  | 5,468 |  | 6,049
Payments for restructuring |  | 0 | 287 |
Restructuring charge |  | 0 | 595 |
CHINA |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Remaining performance requirements for APC projects |  | 32 |  |
Total Revenues |  | 2 | 338 |
Net loss |  | 127 | $ (850) |
Total assets |  | 3,332 |  | 4,249
Liabilities |  | 316 |  | 399
Total net assets |  | 3,016 |  | $ 3,850
CHINA | Employee Severance |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring, expected cost |  | $ 532 |  |
CHINA | Facility Closing |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charge | $ 63 |  |  |

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