Stockholders' Equity - Additional Information (Detail) - USD ($)			6 Months Ended
	Nov. 08, 2016	Jun. 09, 2011	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Stockholders' Equity Note [Line Items]
Shares of preferred stock authorized			10,000,000		10,000,000
Par value per share (in dollars per share)			$ 0.0001		$ 0.0001
Shares of common stock authorized for issuance			100,000,000		100,000,000
Common stock, par value (in dollars per share)			$ 0.0001		$ 0.0001
Shares of common stock issued			13,773,853		13,627,220
Shares of common stock outstanding			13,773,853		13,627,220
Options expiration period			10 years
Stock compensation expense			$ 731,000	$ 564,000
Common stock value per share			$ 11.90
Unamortized stock compensation			$ 2,200,000
Outstanding at the end of the period (in shares)			816,461
Vested (in shares)			633,283
Stock Options [Member]
Stockholders' Equity Note [Line Items]
Stock options outstanding			200,000
Stock options exercisable			200,000
Restricted Stock [Member]
Stockholders' Equity Note [Line Items]
Weighted average period for recognition			2 years 6 months
Vested (in shares)			61,230
Key Officers [Member] | Non-qualified Stock Options [Member]
Stockholders' Equity Note [Line Items]
Stock options granted	200,000
Vesting period	3 years
Stock options granted exercise price	$ 10.40
Non-employee Directors [Member]
Stockholders' Equity Note [Line Items]
Stock options granted		10,000
Non-employee Directors and Key Officers [Member]
Stockholders' Equity Note [Line Items]
Stock compensation expense			$ 0	$ 0
2007 Incentive Award Plan [Member]
Stockholders' Equity Note [Line Items]
Number of shares of common stock which may be awarded			1,000,000
Share-based compensation award plan , expiration date			Jun. 11, 2017
2017 Incentive Award Plan [Member]
Stockholders' Equity Note [Line Items]
Number of shares of common stock which may be awarded			2,000,000
Plan effective date			Apr. 24, 2017
Number of shares available for future issuance			1,626,326
Series A Preferred Stock [Member]
Stockholders' Equity Note [Line Items]
Shares of preferred stock authorized			500,000		500,000
Par value per share (in dollars per share)			$ 0.0001		$ 0.0001
Preferred stock, shares outstanding			0		0
Series B Preferred Stock, Non-Voting [Member]
Stockholders' Equity Note [Line Items]
Shares of preferred stock authorized			6,500,000		6,500,000
Par value per share (in dollars per share)			$ 0.0001		$ 0.0001
Preferred stock, voting rights			There are no voting rights associated with the Series B preferred stock.
Preferred stock, shares outstanding			0		0