Earnings Per Share - Details of Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income (loss)	$ 48	$ (2,381)
Dividends paid to preferred stockholders	(34)	(141)
Net income (loss) available to common stockholders	$ 14	$ (2,522)
Denominator:
Weighted average shares outstanding – basic	31,297	15,299
Potential common shares – options / warrants (treasury stock method)	26
Weighted average shares outstanding – diluted	31,323	15,299
Shares excluded (anti-dilutive)		135
Shares excluded due to an exercise price greater than weighted average stock price for the period	11,213	1,073
Net earnings (loss) per common share:
Basic	$ 0.00	$ (0.16)
Diluted	$ 0.00	$ (0.16)