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Stockholders' Equity - Additional Information (Detail) - USD ($) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 30, 2018 | Apr. 19, 2016 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Number of shares converted | 1,400,000 |  |  | 1,400,000 |  |  |
2019 Restricted Stock [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Restricted stock, vesting percentage per year |  |  |  | 33.33% |  |  |
Restricted stock, vesting period |  |  |  | 3 years |  |  |
2019 Restricted Stock [Member] | Tranche Three [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Restricted stock, vesting percentage |  |  |  | 100.00% |  |  |
2018 Restricted Stock [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Restricted stock, vesting percentage per year |  |  |  |  | 33.33% |  |
Restricted stock, vesting period |  |  |  |  | 3 years |  |
2018 Restricted Stock [Member] | Tranche Two [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Restricted stock, vesting percentage |  |  |  |  | 100.00% |  |
2017 Restricted Stock [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Restricted stock, vesting percentage per year |  |  |  |  |  | 33.33% |
Restricted stock, vesting period |  |  |  |  |  | 3 years |
2017 Restricted Stock [Member] | Tranche One [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Restricted stock, vesting percentage |  |  |  |  |  | 100.00% |
Performance Based Restricted Stock [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Awards granted | 275,119 | 210,602 |  | 221,439 |  |  |
Restricted stock, vesting period |  |  |  | 3 years |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Awards granted |  |  |  | 31,833 | 35,511 | 37,992 |
Vesting description |  |  |  | Vesting occurs upon the earliest to occur: (i) the director’s separation from service, (ii) the third anniversary of the grant date, or (iii) the occurrence of a change of control as defined by the agreement. |  |  |
2016 Plan [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Long term incentive plan, effective date |  |  |  |  |  |  | Apr. 19, 2016
Term of long term incentive plan |  |  | 10 years |  |  |  |
Aggregate number of shares reserved and available for issuance | 1,285,922 |  |  | 1,285,922 |  |  | 2,750,000
Minimum exercise price of stock option at grant date |  |  |  | No less than 100% of the fair market value, as defined in the 2016 Plan, of the shares on the date of grant. |  |  |
Percentage of fair market value |  |  |  |  |  |  | 100.00%
Maximum term of stock option |  |  |  |  |  |  | 10 years
Options granted |  |  |  | 0 | 0 | 0 |
2008 Plan [Member] |  |  |  |  |  |  |
Stockholders Equity [Line Items] |  |  |  |  |  |  |
Awards granted |  |  |  |  |  |  | 0
Options vest at a percentage rate for first 5 years |  |  |  | 16.50% |  |  |
Options final year vesting |  |  |  | end of the sixth year |  |  |
Total stock based compensation expense not yet recognized, relating to non-vested restricted stock and stock options | $ 3,378,000 |  |  | $ 3,378,000 |  |  |

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