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Debt (Narrative) (Details) SEK in Thousands |  |  |  | 3 Months Ended | 5 Months Ended | 6 Months Ended | 12 Months Ended | 14 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 30, 2017 | Oct. 15, 2014 USD ($) | Sep. 02, 2014 USD ($) | Dec. 31, 2014 USD ($) | Sep. 30, 2014 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2014 USD ($) | Mar. 31, 2015 CNY (¥) | Aug. 12, 2016 USD ($) | Dec. 31, 2015 SEK | Dec. 31, 2015 USD ($) | Oct. 18, 2014 | Sep. 12, 2014 USD ($) | Oct. 04, 2010 USD ($) | Nov. 02, 2007 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized deferred financing costs |  |  |  |  |  |  |  |  |  |  | $ 399,000 |  |  |  |  |  |
Notes covenant compliance |  |  |  |  |  |  |  | The Company was in compliance with all debt covenants at December 31, 2016 and 2015. |  |  |  |  |  |  |  |  |
Borrowings outstanding |  | $ 100,000,000 |  |  |  | $ 67,000,000 |  | $ 67,000,000 |  |  |  |  | $ 100,000,000 |  |  |  |
Total long-term debt, net |  |  |  |  |  | 8,060,000 |  | 8,060,000 |  |  |  |  | 4,458,000 |  |  |  |
Less: current portion |  |  |  |  |  | 8,626,000 |  | 8,626,000 |  |  |  |  | 13,905,000 |  |  |  |
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  | $ (10,607,000) |  |  |  |  |  |  |  |
2017 |  |  |  |  |  | 8,626,000 |  | 8,626,000 |  |  |  |  |  |  |  |  |
2018 |  |  |  |  |  | 4,303,000 |  | 4,303,000 |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 2,604,000 |  | 2,604,000 |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  | 611,000 |  | 611,000 |  |  |  |  |  |  |  |  |
2021 |  |  |  |  |  | 67,542,000 |  | $ 67,542,000 |  |  |  |  |  |  |  |  |
Senior Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write off of deferred financing costs |  |  |  | $ 535,000 | $ 295,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.50% |
Debt instrument, maturity date |  |  |  |  |  |  |  | Oct. 15, 2017 |  |  |  |  |  |  |  |  |
Debt instrument, unamortized discount, percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.50% |  |  |
Face value of senior secured notes |  |  |  |  |  | $ 175,000,000 |  | $ 175,000,000 |  |  |  |  |  |  |  |  |
Percentage of outstanding debt redeemed |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt early redemption percentage |  | 104.75% | 103.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of debt discount (premium) |  |  |  | 2,019,000 |  |  |  |  |  |  |  |  |  |  |  |  |
De-designation date unrecognized gain on interest rate swap |  |  |  | 348,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption of notes |  | $ 157,500,000 | $ 17,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 175,000,000 |
Loss on early extinguishment of debt |  |  |  | (9,687,000) | (820,000) |  | $ (10,507,000) |  |  |  |  |  |  |  |  |  |
Premium paid on extinguishment of debt |  |  |  | 7,481,000 | $ 525,000 |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write off of deferred financing costs |  |  |  |  |  |  |  |  | 100,000 |  |  |  |  |  |  |  |
Capitalized deferred financing costs |  |  |  | $ 1,666,000 |  |  | $ 1,666,000 |  | $ 1,666,000 |  |  |  |  |  |  |  |
Credit Facility covenant compliance |  |  |  |  |  |  |  | The Company was in compliance with all Credit Facility covenants at December 31, 2016 and 2015. |  |  |  |  |  |  |  |  |
Debt interest rate |  |  |  |  |  | 2.00% |  | 2.00% |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000,000 |  | $ 100,000,000
Increase in maximum borrowing capacity of credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 80,000,000 |  |
Credit facility, borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 100,000,000
Borrowings outstanding |  |  |  |  |  | $ 67,000,000 |  | $ 67,000,000 |  |  |  |  | 100,000,000 |  |  |  |
Maximum leverage ratio |  |  |  |  |  | 300.00% |  | 300.00% |  |  |  |  |  |  |  |  |
Minimum interest coverage ratio |  |  |  |  |  | 350.00% |  | 350.00% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, commitment fee percentage |  |  |  |  |  |  |  | 0.35% |  |  |  |  |  |  |  |  |
Revolving Credit Facility [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, commitment fee percentage |  |  |  |  |  |  |  | 0.20% |  |  |  |  |  |  |  |  |
Line of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  |  |  | $ 2,196,000 |  | $ 2,196,000 |  |  |  | SEK 20,000 | $ 2,369,000 |  |  |  |
Letter of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  |  |  | $ 3,399,000 |  | $ 3,399,000 |  |  |  |  |  |  |  |  |
Term Loan Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt, face amount | ¥ |  |  |  |  |  |  |  |  |  | ¥ 9,000,000 |  |  |  |  |  |  |
Term Loan Two [Member] | People's Bank of China One-Year Lending Rate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate multiplier |  |  |  |  |  |  |  |  |  | 120.00% |  |  |  |  |  |  |
Amendment Number Three [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facilty amendement date |  |  |  |  |  | Aug. 12, 2016 |  |  |  |  |  |  |  |  |  |  |
Length of the amended extension to the expiration date on debt |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |
Line of credit expiration date |  |  |  |  |  | Sep. 12, 2021 |  |  |  |  |  |  |  |  |  |  |
PST Eletronica Ltda [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt, weighted average interest rate |  |  |  |  |  | 14.10% |  | 14.10% |  |  |  |  |  |  |  |  |
Short-term debt, weighted average interest rate |  |  |  |  |  | 10.30% |  | 10.30% |  |  |  |  |  |  |  |  |
PST Eletronica Ltda [Member] | Term Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 |  |  |  |  |  | $ 8,489,000 |  | $ 8,489,000 |  |  |  |  |  |  |  |  |
2018 |  |  |  |  |  | 4,303,000 |  | 4,303,000 |  |  |  |  |  |  |  |  |
2019 |  |  |  |  |  | 2,604,000 |  | 2,604,000 |  |  |  |  |  |  |  |  |
2020 |  |  |  |  |  | 611,000 |  | 611,000 |  |  |  |  |  |  |  |  |
2021 |  |  |  |  |  | 542,000 |  | 542,000 |  |  |  |  |  |  |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility,amendment date | Jan. 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowing Sub-Limit for the Company's Foreign Subsidiaries [Member] | Amendment Number Three [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Credit facility, capacity restrictions of investment activities |  |  |  |  |  | 80,000,000 |  | 80,000,000 |  |  |  |  |  |  |  |  |
Increase in sub-limit for foreign subsidiary borrowings |  |  |  |  |  | 30,000,000 |  | 30,000,000 |  |  |  |  |  |  |  |  |
Permitted Loans and Investments in Foreign Subsidiaries [Member] | Amendment Number Three [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in permitted loans and investments in foregin subsidiaries |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |  |  |
Amount of permitted loans and investments in foregin subsidiaries |  |  |  |  |  | $ 30,000,000 |  | $ 30,000,000 |  |  |  |  |  |  |  |  |

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