Income Taxes - Current and Non-current Deferred Income Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Components of Deferred Tax Assets and Liabilities [Abstract]
Allowance for doubtful accounts	$ 1,401	$ 634
Accrued compensation	3,718	1,935
Other accruals	0	156
Other	571	502
Net operating loss carry-forwards	17,687	17,825
Nonqualified stock options and warrants	2,056	1,613
Operating lease liabilities	6,822
Gross deferred tax assets	32,255	22,665
Less: valuation allowance	(1,261)	(323)
Total deferred tax assets	30,994	22,342
Operating right-of-use assets	(6,422)
Accumulated depreciation and amortization	(40,138)	(44,799)
Total deferred tax liabilities	(46,560)	(44,799)
Net deferred income tax liability	$ (15,566)	$ (22,457)