Income (Loss) per Share - Computation of Basic and Diluted Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
NET (LOSS) INCOME	$ (169)	$ 1,192	$ (831)	$ 504
Denominator:
Weighted shares outstanding - basic	18,240,811	18,159,029	18,157,941	18,179,906
Net income per common share - basic
Net (loss) income	$ (0.01)	$ 0.07	$ (0.05)	$ 0.03
Weighted Average Shares:
Weighted shares outstanding - basic	18,240,811	18,159,029	18,157,941	18,179,906
Common stock option grants	0	1,559,000	0	8,442,000
Weighted shares outstanding - diluted	18,240,811	18,213,617	18,157,941	18,351,880
Net income per common share - diluted
Net (loss) income	$ (0.01)	$ 0.07	$ (0.05)	$ 0.03
Restricted Stock [Member]
Weighted Average Shares:
Performance related awards/Restricted shares subject to vesting	0	44,821,000	0	147,116,000
Performance Related Awards [Member]
Weighted Average Shares:
Performance related awards/Restricted shares subject to vesting	0	8,208,000	0	16,416,000