Consolidated Statements of Operations - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Income Statement [Abstract] | |||
| Net sales | $ 687,969 | $ 633,712 | $ 698,218 |
| Cost of sales | 531,743 | 498,848 | 545,356 |
| Gross profit | 156,226 | 134,864 | 152,862 |
| Operating expenses | |||
| Selling, general and administrative expenses | 89,094 | 94,378 | 126,954 |
| Research and development expenses | 72,180 | 83,420 | 92,765 |
| Restructuring and impairment charges (gain) | (7,785) | 10,269 | |
| Total operating expenses | 153,489 | 177,798 | 229,988 |
| Operating income (loss) | 2,737 | (42,934) | (77,126) |
| Interest expense | (16,238) | (16,268) | (16,833) |
| Foreign currency loss, net | (15,360) | (42,531) | (24,650) |
| Other income, net | 2,990 | 1,779 | 2,900 |
| Loss before income tax expenses | (25,871) | (99,954) | (115,709) |
| Income tax expenses (benefits) | 3,744 | (15,087) | 1,523 |
| Net loss | $ (29,615) | $ (84,867) | $ (117,232) |
| Loss per common share- | |||
| Basic/ Diluted | $ (0.85) | $ (2.47) | $ (3.44) |
| Weighted average number of shares- | |||
| Basic/ Diluted | 34,833,967 | 34,380,517 | 34,055,513 |