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Stockholders' Equity - Summary of Restricted Stock Activity (Detail) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 30, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Income tax benefit |  |  | $ (36,000) | $ (42,000) | $ (54,000)
Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unvested outstanding beginning of year |  |  | 618,072 |  |
Granted, Shares |  |  | 31,138 | 285,956 | 369,350
Vested, Shares |  |  | (283,418) |  |
Cancelled or forfeited, Shares |  |  | (23,121) |  |
Unvested outstanding end of year | 618,072 |  | 342,671 | 618,072 |
Unvested outstanding beginning of year |  |  | $ 5.42 |  |
Weighted-average fair value per restricted stock granted during year |  |  | 2.81 | $ 4.28 | $ 5.47
Vested, weighted-average grant date fair value |  |  | 4.90 |  |
Cancelled or forfeited, weighted-average grant date fair value |  |  | 7.97 |  |
Unvested outstanding end of year | $ 5.42 |  | $ 4.53 | $ 5.42 |
Total fair value of restricted stock granted |  |  | $ 87,000 | $ 1,223,000 | $ 2,019,000
Income tax benefit |  |  | $ (279,000) | $ (374,000) | $ (398,000)
Total weighted-average remaining vesting period in years |  |  | 1 year 7 months 9 days | 2 years 2 months 4 days | 1 year 9 months 10 days
Total fair value of restricted stock vested during the year |  |  | $ 1,389,000 | $ 3,371,000 | $ 7,355,000
Restricted Stock [Member] | Cost of Sales [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  |  | 62,000 | 255,000 | 385,000
Restricted Stock [Member] | SG&A [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  |  | $ 1,078,000 | $ 1,263,000 | $ 7,574,000
Performance Based Restricted Stock [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unvested outstanding beginning of year |  |  | 221,439 |  |
Granted, Shares | 275,119 | 210,602 | 306,257 | 221,439 |
Unvested outstanding end of year | 221,439 |  | 527,696 | 221,439 |
Unvested outstanding beginning of year |  |  | $ 7.26 |  |
Weighted-average fair value per restricted stock granted during year |  |  | 3.20 | $ 7.26 |
Unvested outstanding end of year | $ 7.26 |  | $ 4.90 | $ 7.26 |
Total fair value of restricted stock granted |  |  | $ 980,000 | $ 1,608,000 |
Income tax benefit |  |  | $ (53,000) | $ (84,000) |
Total weighted-average remaining vesting period in years |  |  | 1 year 6 months 25 days | 1 year 2 months 4 days |
Performance Based Restricted Stock [Member] | Cost of Sales [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 53,000 |
Performance Based Restricted Stock [Member] | SG&A [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  |  | $ 218,000 | $ 290,000 |
Restricted Stock Units [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Unvested outstanding beginning of year |  |  | 86,340 |  |
Granted, Shares |  |  | 231,816 | 31,833 | 35,511
Vested, Shares |  |  | (18,996) |  |
Unvested outstanding end of year | 86,340 |  | 299,160 | 86,340 |
Unvested outstanding beginning of year |  |  | $ 6.51 |  |
Weighted-average fair value per restricted stock granted during year |  |  | 1.10 | $ 5.89 | $ 5.28
Vested, weighted-average grant date fair value |  |  | 9.87 |  |
Unvested outstanding end of year | $ 6.51 |  | $ 2.11 | $ 6.51 |
Total fair value of restricted stock granted |  |  | $ 255,000 | $ 187,000 | $ 187,000
Income tax benefit |  |  | $ (63,000) | $ (46,000) | $ (34,000)
Total weighted-average remaining vesting period in years |  |  | 5 months 23 days | 1 year 6 months 25 days | 1 year 9 months
Total fair value of restricted stock vested during the year |  |  | $ 187,000 | $ 187,000 | $ 125,000
Restricted Stock Units [Member] | SG&A [Member] |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |
Stock-based compensation expense |  |  | $ 255,000 | $ 187,000 | $ 187,000

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