Income Taxes - Schedule of Federal Deferred Tax Assets and Deferred Tax Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Net operating loss carryforwards	$ 18,083	$ 8,093
Accounts payable and accrued expenses	4,024	4,429
Non-cash compensation	9,597	9,510
Intangibles amortization	5,691	5,513
Allowance for doubtful accounts	315	232
Total deferred tax assets	37,710	27,777
Less valuation allowance	(30,185)	(23,260)
Deferred tax assets, net of valuation allowance	7,525	4,517
Deferred tax liabilities:
Property and equipment	(3,736)	(2,010)
Goodwill amortization and contingent earn-out adjustments	(4,172)	(2,669)
Total deferred tax liabilities	(7,908)	(4,679)
Net deferred (liabilities)	$ (383)	$ (162)