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Income Taxes (Income Tax Rate Reconciliation) (Detail) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Effective income tax rate continuing operations tax rate reconciliation [Abstract] |  |  |
Federal income tax computed at the statutory rate | 21.00% | 35.00% | 35.00%
Increase (reduction) in taxes resulting from: [Abstract] |  |  |
Tax reform/change in tax rate | 0.00% | (71.40%) | 0.00%
Mark-to-market on warrants | (0.70%) | 1.40% | (1.50%)
Change in valuation allowance | (20.90%) | (116.90%) | (2.20%)
Tax return and deferred inventory adjustments | (1.00%) | 0.80% | 3.60%
Foreign taxes | 0.00% | 8.20% | 0.00%
Non deductible compensation | 0.00% | 0.00% | (1.40%)
Basis difference in foreign subsidiary | 0.00% | 0.00% | (33.00%)
Other | 1.60% | 0.10% | (0.30%)
Effective tax rate | 0.00% | (142.80%) | 0.20%

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