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v3.19.1

Selected Quarterly Financial Data (Unaudited) - Effect of Restatement on Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 131,476 | $ 99,953 | $ 100,922 | $ 84,265 | $ 98,280 | $ 78,944 | $ 85,771 | $ 76,470 |  |  |  |  | $ 416,616 | $ 339,465 | $ 362,387 | $ 347,580
Cost of sales | 115,981 | 86,702 | 88,443 | 74,497 | 86,376 | 72,820 | 81,253 | 69,827 |  |  |  |  | 365,623 | 310,276 | 311,148 | 283,540
Gross profit | 15,495 | 13,251 | 12,479 | 9,768 | 11,904 | 6,124 | 4,518 | 6,643 |  |  |  |  | 50,993 | 29,189 | 51,239 | 64,040
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research, development and engineering expenses | 6,459 | 5,687 | 3,848 | 3,950 | 4,742 | 4,498 | 4,817 | 4,904 |  |  |  |  | 19,944 | 18,961 | 23,574 | 19,305
Selling, general and administrative expenses | 11,297 | 12,062 | 10,688 | 10,209 | 8,563 | 6,855 | 6,699 | 6,405 |  |  |  |  | 44,256 | 28,522 | 28,837 | 23,142
Asset impairment charges | 1 | 0 | 0 | 0 | 167 | 38 | 1,064 | 345 |  |  |  |  | 1 | 1,614 | 11,686 | 310
Amortization of intangible assets | 1,210 | 1,210 | 1,209 | 1,209 | 1,430 | 1,429 | 1,429 | 1,428 |  |  |  |  | 4,838 | 5,716 | 4,582 | 1,013
Total operating expenses | 18,967 | 18,959 | 15,745 | 15,368 | 14,902 | 12,820 | 13,726 | 13,082 |  |  |  |  | 69,039 | 54,530 | 68,656 | 39,930
Operating (loss) income | (3,472) | (5,708) | (3,266) | (5,600) | (2,998) | (6,696) | (9,208) | (6,439) |  |  |  |  | (18,046) | (25,341) | (17,417) | 24,110
Other expense (income): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense | 1,703 | 1,654 | 1,404 | 6,080 | 4,402 | 3,726 | 1,649 | 1,438 |  |  |  |  | 10,841 | 11,215 | 4,320 | 1,342
Gain from change in fair value of warrants | 1,500 | 1,700 | 800 | 0 | 0 | 0 | (157) | (1,256) |  |  |  |  | 4,000 | (1,413) | (9,300) | (6,170)
Other expense, net | (225) | (9) | 2,142 | 453 | 146 | 62 | 92 | 59 |  |  |  |  | 2,361 | 359 | 144 | (283)
Total other expense (income) | 2,978 | 3,345 | 4,346 | 18,454 | 4,880 | 3,813 | 1,584 | 241 |  |  |  |  | 29,123 | 10,518 | (4,824) | (5,111)
(Loss) income before income taxes | (6,450) | (9,053) | (7,612) | (24,054) | (7,878) | (10,509) | (10,792) | (6,680) |  |  |  |  | (47,169) | (35,859) | (12,593) | 29,221
Income tax expense (benefit) | (320) | 149 | 135 | 479 | (1,238) | (1,792) | 18,000 | (3,357) |  |  |  |  | 443 | 11,613 | (9,702) | 7,744
Net (loss) income | $ (6,130) | $ (9,202) | $ (7,747) | $ (24,533) | $ (6,640) | $ (8,717) | $ (28,792) | $ (3,323) | $ (32,280) | $ (32,115) | $ (41,482) | $ (40,832) | $ (47,612) | $ (47,472) | $ (2,891) | $ 21,477
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) |  |  |  |  |  |  |  | 10,819 |  |  |  |  | 13,787 | 10,931 | 10,808 | 10,705
Diluted (in shares) |  |  |  |  |  |  |  | 10,819 |  |  |  |  | 13,787 | 10,931 | 10,991 | 11,131
(Loss) earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) |  |  |  |  |  |  |  | $ (0.42) |  |  |  |  | $ (6.20) | $ (4.34) | $ (0.27) | $ 2.01
Diluted (in dollars per share) |  |  |  |  |  |  |  | $ (0.42) |  |  |  |  | $ (6.20) | $ (4.47) | $ (1.11) | $ 1.38
Previously Reported |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  | $ 61,814 |  |  |  |  |  |  | $ 389,446 | $ 347,995
Cost of sales |  |  |  |  |  |  |  | 57,758 |  |  |  |  |  |  | 326,612 | 280,950
Gross profit |  |  |  |  |  |  |  | 4,056 |  |  |  |  |  |  | 62,834 | 67,045
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research, development and engineering expenses |  |  |  |  |  |  |  | 5,250 |  |  |  |  |  |  | 21,681 | 16,900
Selling, general and administrative expenses |  |  |  |  |  |  |  | 6,058 |  |  |  |  |  |  | 27,376 | 23,088
Asset impairment charges |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  | 0 | 0
Amortization of intangible assets |  |  |  |  |  |  |  | 1,429 |  |  |  |  |  |  | 4,582 | 1,013
Total operating expenses |  |  |  |  |  |  |  | 12,737 |  |  |  |  |  |  | 53,639 | 41,001
Operating (loss) income |  |  |  |  |  |  |  | (8,681) |  |  |  |  |  |  | 9,195 | 26,044
Other expense (income): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  | 1,421 |  |  |  |  |  |  | 4,327 | 1,331
Gain from change in fair value of warrants |  |  |  |  |  |  |  | (1,256) |  |  |  |  |  |  | (9,299) | (6,169)
Other expense, net |  |  |  |  |  |  |  | 85 |  |  |  |  |  |  | 229 | 183
Total other expense (income) |  |  |  |  |  |  |  | 250 |  |  |  |  |  |  | (4,695) | (8,495)
(Loss) income before income taxes |  |  |  |  |  |  |  | (8,931) |  |  |  |  |  |  | 13,890 | 34,539
Income tax expense (benefit) |  |  |  |  |  |  |  | (3,680) |  |  |  |  |  |  | (388) | 10,813
Net (loss) income |  |  |  |  |  |  |  | $ (5,251) |  |  |  |  |  |  | $ 14,278 | $ 23,726
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) |  |  |  |  |  |  |  | 10,819 |  |  |  |  |  |  | 10,808 | 10,707
Diluted (in shares) |  |  |  |  |  |  |  | 10,819 |  |  |  |  |  |  | 11,074 | 11,132
(Loss) earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) |  |  |  |  |  |  |  | $ (0.49) |  |  |  |  |  |  | $ 1.32 | $ 2.22
Diluted (in dollars per share) |  |  |  |  |  |  |  | $ (0.49) |  |  |  |  |  |  | $ 0.45 | $ 2.13
Restatement Adjustments and Reclassifications |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  | $ 14,656 |  |  |  |  |  |  | $ (27,059) | $ (415)
Cost of sales |  |  |  |  |  |  |  | 12,069 |  |  |  |  |  |  | (15,464) | 2,590
Gross profit |  |  |  |  |  |  |  | 2,587 |  |  |  |  |  |  | (11,595) | (3,005)
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Research, development and engineering expenses |  |  |  |  |  |  |  | (346) |  |  |  |  |  |  | 1,893 | 2,405
Selling, general and administrative expenses |  |  |  |  |  |  |  | 347 |  |  |  |  |  |  | 1,461 | 54
Asset impairment charges |  |  |  |  |  |  |  | 345 |  |  |  |  |  |  | 11,686 | 310
Amortization of intangible assets |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  | 0 | 0
Total operating expenses |  |  |  |  |  |  |  | 345 |  |  |  |  |  |  | 15,017 | (1,071)
Operating (loss) income |  |  |  |  |  |  |  | 2,242 |  |  |  |  |  |  | (26,612) | (1,934)
Other expense (income): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  | 17 |  |  |  |  |  |  | (7) | 11
Gain from change in fair value of warrants |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  | (1) | (1)
Other expense, net |  |  |  |  |  |  |  | (26) |  |  |  |  |  |  | (85) | (466)
Total other expense (income) |  |  |  |  |  |  |  | (9) |  |  |  |  |  |  | (129) | 3,384
(Loss) income before income taxes |  |  |  |  |  |  |  | 2,251 |  |  |  |  |  |  | (26,483) | (5,318)
Income tax expense (benefit) |  |  |  |  |  |  |  | 323 |  |  |  |  |  |  | (9,314) | (3,069)
Net (loss) income |  |  |  |  |  |  |  | $ 1,928 |  |  |  |  |  |  | $ (17,169) | $ (2,249)
Weighted-average common shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  | 0 | (2)
Diluted (in shares) |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  | (83) | (1)
(Loss) earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) |  |  |  |  |  |  |  | $ 0.07 |  |  |  |  |  |  | $ (1.59) | $ (0.21)
Diluted (in dollars per share) |  |  |  |  |  |  |  | $ 0.07 |  |  |  |  |  |  | $ (1.56) | $ (0.75)

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