Summary of Shares Included in Diluted Earnings Per Share (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Weighted average shares of common stock outstanding - basic	32,674,459	25,067,954	32,548,662	25,067,954
Weighted average shares of common stock outstanding - diluted	37,850,679	28,417,877	37,935,773	28,417,877
Employee Stock Option [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment	692,506	564,595	720,103	564,595
Common Stock [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment	3,039,609	2,785,328	3,039,609	2,785,328
Warrant [Member]
Weighted Average Number Diluted Shares Outstanding Adjustment	1,444,105	0	1,627,399	0