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Summary of Significant Accounting Policies - Narrative (Detail) $ / shares in Units, shares in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2020 USD ($) $ / shares | Sep. 30, 2020 USD ($) $ / shares | Jun. 30, 2020 USD ($) $ / shares | Mar. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) $ / shares | Sep. 30, 2019 USD ($) $ / shares | Jun. 30, 2019 USD ($) $ / shares | Mar. 31, 2019 USD ($) $ / shares | Dec. 31, 2020 USD ($) segment $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  |  |  |  |  |  |  |  | $ 24,974,000 | $ 39,432,000 | $ 25,610,000
Cost of goods sold | $ (32,999,000) | $ (18,227,000) | $ (11,906,000) | $ (41,089,000) | $ (29,793,000) | $ (38,555,000) | $ (43,068,000) | $ (40,605,000) | (104,221,000) | (152,021,000) | (143,103,000)
Income tax (benefit) expense |  |  |  |  |  |  |  |  | (12,980,000) | 7,809,000 | 5,509,000
Retained earnings | 121,267,000 |  |  |  | 83,313,000 |  |  |  | 121,267,000 | 83,313,000 |
Net income | $ (2,884,000) | $ 36,282,000 | $ 4,640,000 | $ (84,000) | $ 2,388,000 | $ 10,926,000 | $ 14,276,000 | $ 4,033,000 | $ 37,954,000 | $ 31,623,000 | $ 20,101,000
Basic (in dollars per share) | $ / shares | $ (0.07) | $ 0.91 | $ 0.12 | $ 0 | $ 0.06 | $ 0.27 | $ 0.36 | $ 0.10 | $ 0.94 | $ 0.79 | $ 0.50
Diluted (in dollars per share) | $ / shares | $ (0.07) | $ 0.91 | $ 0.12 | $ 0 | $ 0.05 | $ 0.27 | $ 0.36 | $ 0.10 | $ 0.94 | $ 0.78 | $ 0.50
Deferred revenue, revenue recognized |  |  |  |  |  |  |  |  | $ 3,325,000 | $ 1,017,000 |
Deferred revenue balance | $ 6,875,000 |  |  |  | $ 7,654,000 |  |  |  | 6,875,000 | 7,654,000 |
Unbilled receivables | 1,443,000 |  |  |  | 2,282,000 |  |  |  | 1,443,000 | 2,282,000 |
Accounts receivable, net | 69,720,000 |  |  |  | 58,925,000 |  |  |  | 69,720,000 | 58,925,000 |
Amortization of deferred financing charges and debt discount |  |  |  |  |  |  |  |  | 290,000 | 861,000 | $ 546,000
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 |  |  |  |  |  |  |  |  | 1,886 | 764 | 854
Right of use assets upon adoption | 373,000 |  |  |  | 505,000 |  |  |  | $ 373,000 | $ 505,000 |
Long-term debt, current and long-term portions | 474,000 |  |  |  | 590,000 |  |  |  | 474,000 | 590,000 |
Gain (Loss) on sale of assets and asset impairment charges |  |  |  |  |  |  |  |  |  | 15,542,000 |
Impairment loss |  |  |  |  |  |  |  |  | 5,115,000 | 15,542,000 | $ 17,835,000
Operating lease right-of-use assets | 32,099,000 |  |  |  | 28,178,000 |  |  |  | 32,099,000 | 28,178,000 |
Operating lease liabilities, current and long-term portions | $ 34,097,000 |  |  |  | 28,577,000 |  |  |  | 34,097,000 | 28,577,000 |
Additions and revisions of prior estimates |  |  |  |  |  |  |  |  | $ 8,458,000 | (5,114,000) |
Revision of Prior Period, Adjustment |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest |  |  |  |  |  |  |  |  |  |  | 1,800,000
Cost of goods sold |  |  |  |  |  |  |  |  |  |  | 1,800,000
Income tax (benefit) expense |  |  |  |  |  |  |  |  |  |  | 387,000
Retained earnings |  |  |  |  | 1,413,000 |  |  |  |  | 1,413,000 |
Net income |  |  |  |  |  |  |  |  |  |  | $ 1,413,000
Basic (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.03
Diluted (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.03
Accounting Standards Update 2016-02 |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Right of use assets upon adoption |  |  |  |  | $ 35,939,000 |  |  |  |  | 35,939,000 |
Developed technology |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Useful Life (in years) |  |  |  |  |  |  |  |  | 13 years |  |
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 |  |  |  |  |  |  |  |  | $ (40,891,000) | $ (76,643,000) | $ (70,532,000)

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