Earnings Per Share - Details of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net income	$ 1,379	$ 3,436	$ 3,424	$ 3,484
Dividends paid to preferred stockholders		(34)		(67)
Net income available to common stockholders	$ 1,379	$ 3,402	$ 3,424	$ 3,417
Denominator:
Weighted average shares outstanding – basic	41,127	32,068	40,305	31,685
Potential common shares – options / warrants (treasury stock method)	1,952	3,240	2,041	1,680
Weighted average shares outstanding – diluted	43,079	35,308	42,346	33,365
Shares excluded (anti-dilutive)	98	125	98	125
Net earnings per common share:
Basic	$ 0.03	$ 0.11	$ 0.08	$ 0.11
Diluted	$ 0.03	$ 0.10	$ 0.08	$ 0.10