Stockholders' Equity - Additional Information (Detail) - USD ($)					12 Months Ended
	Jul. 06, 2020	Dec. 31, 2019	Dec. 30, 2018	Apr. 19, 2016	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016
Stockholders Equity [Line Items]
Number of shares converted					1,600,000
Ownership change description	A company generally experiences an ownership change if the percentage of the value of its stock owned by certain 5% shareholders, as defined in Section 382 of the Code, increases by more than 50% points over a rolling three-year period.
Beneficial ownership percentage	4.90%
2020 Restricted Stock [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage per year					33.33%
Restricted stock, vesting period					3 years
2020 Restricted Stock [Member] | Tranche Three [Member]
Stockholders Equity [Line Items]
Restricted stock, vesting percentage					100.00%
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 Two [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 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		306,257	221,439
Restricted stock, vesting period					3 years
Restricted Stock Units (RSUs) [Member]
Stockholders Equity [Line Items]
Awards granted					231,816	31,833	35,511
Vesting description					Vesting occurs upon the earliest to occur: (i) the director’s separation from service, (ii) the first anniversary of the grant date (for 2020 grants), (iii) the third anniversary of the grant date (for 2019 and 2018 grants), or (iv) 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					1,016,951			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
Total stock based compensation expense not yet recognized, relating to non-vested restricted stock and stock options					$ 2,212,000
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