v3.19.1

Summary of Significant Accounting Policies; Prior Period Reclassification - Impact of Prior Period Reclassification on Consolidated Statement of Operations (Detail) - USD ($) | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |
Net sales |  | $ 24,177,000 | $ 13,615,000
Cost of sales |  | 19,128,000 | 12,235,000
Gross profit |  | 5,049,000 | 1,380,000
Selling, general and administrative expenses |  | 14,700,000 | 8,094,000
Operating loss |  | $ (20,047,000) | (6,714,000)
As Originally Reported [Member] |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |
Net sales |  |  | 13,615,000
Cost of sales |  |  | 11,331,000
Gross profit |  |  | 2,284,000
Selling, general and administrative expenses |  |  | 8,998,000
Operating loss |  |  | (6,714,000)
Effect of Change [Member] |  |  |
Error Corrections And Prior Period Adjustments Restatement [Line Items] |  |  |
Cost of sales | $ 904,000 |  | 904,000
Gross profit |  |  | 904,000
Selling, general and administrative expenses |  |  | $ (904,000)

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