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Summary of Significant Accounting Policies - Narrative (Detail) shares in Thousands |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 01, 2018 | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) segment manufactured_units shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2017 USD ($) shares | Jan. 01, 2019 USD ($)
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue, revenue recognized |  |  |  |  |  |  |  |  |  | $ 1,017,000 |  |  |
Deferred revenue balance |  | $ 7,654,000 |  |  |  | $ 4,095,000 |  |  |  | $ 7,654,000 | $ 4,095,000 |  |
Accounts receivables due period |  |  |  |  |  |  |  |  |  | 30 days |  |  |
Accounts receivables, allowance for doubtful accounts |  | 0 |  |  |  | 42,000 |  |  |  | $ 0 | 42,000 |  |
Unbilled receivables |  | 2,282,000 |  |  |  | 578,000 |  |  |  | 2,282,000 | 578,000 |  |
Accounts receivable, net |  | 60,052,000 |  |  |  | 18,989,000 |  |  |  | 60,052,000 | 18,989,000 |  |
Cost of goods sold |  | 29,793,000 | $ 38,555,000 | $ 43,068,000 | $ 40,605,000 | 34,217,000 | $ 40,595,000 | $ 34,678,000 | $ 35,413,000 | 152,021,000 | 144,903,000 | $ 100,304,000 |
Inventory write-down |  |  |  |  |  |  |  |  |  | 0 | 0 |  |
Amortization of deferred financing charges and debt discount |  |  |  |  |  |  |  |  |  | 861,000 | 546,000 | 455,000 |
Tax Cuts and Jobs Act of 2017, income tax benefit |  |  |  |  |  | 8,500,000 |  |  |  |  |  |  |
Recognized income tax interest and penalties |  |  |  |  |  |  |  |  |  | 0 | 0 | $ 0 |
Probable environmental matters |  | 0 |  |  |  | 0 |  |  |  | $ 0 | $ 0 |  |
Number of operating segments | segment |  |  |  |  |  |  |  |  |  | 1 |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | shares |  |  |  |  |  |  |  |  |  | 764 | 854 | 251 |
Right of use assets upon adoption |  | 505,000 |  |  |  |  |  |  |  | $ 505,000 |  |  |
Long-term debt, current and long-term portions |  | 590,000 |  |  |  |  |  |  |  | 590,000 |  |  |
Gain (Loss) on sale of assets and asset impairment charges |  |  |  |  |  |  |  |  |  | 15,542,000 |  |  |
Impairment loss |  |  |  |  |  |  |  |  |  | 15,542,000 | $ 17,835,000 | $ 0 |
Operating right-of-use assets |  | 28,178,000 |  |  |  | $ 0 |  |  |  | 28,178,000 | 0 |  |
Operating lease liabilities, current and long-term portions |  | 28,577,000 |  |  |  |  |  |  |  | 28,577,000 |  |  |
Additions and revisions of prior estimates |  | 9,828,000 |  |  |  |  |  |  |  | (5,114,000) | 7,546,000 |  |
Accounting Standards Update 2016-02 |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Right of use assets upon adoption |  | $ 35,939,000 |  |  |  |  |  |  |  | 35,939,000 |  |  |
Operating right-of-use assets |  |  |  |  |  |  |  |  |  |  |  |  | $ 35,939,000
Operating lease liabilities, current and long-term portions |  |  |  |  |  |  |  |  |  |  |  |  | $ 36,484,000
Developed technology |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  |  |  |  |  |  | 7,628,000 |  |  |
Hixton [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on sale of assets and asset impairment charges |  |  |  |  |  |  |  |  |  | 7,914,000 |  |  |
Shipping |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of goods sold |  |  |  |  |  |  |  |  |  | $ 76,643,000 | $ 70,532,000 | $ 50,313,000 |
Quickthree Solutions |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment period | 3 years |  |  |  |  |  |  |  |  | 3 years |  |  |
Minimum | Quickthree Solutions |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement basis, manufactured units | manufactured_units |  |  |  |  |  |  |  |  |  | 11 |  |  |
Maximum | Quickthree Solutions |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Measurement basis, manufactured units | manufactured_units |  |  |  |  |  |  |  |  |  | 20 |  |  |

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