Consolidated Statements of Operations (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Direct operating expenses	$ 31,117	$ 29,915	$ 62,150	$ 57,007
Non-cash stock-based compensation			2,425	2,060
Depreciation and amortization	4,019	4,577	7,958	8,123
Related Parties
Direct operating expenses	2,208	2,392	4,256	4,712
Depreciation and amortization	307	580	614	1,161
Direct Operating Expenses
Non-cash stock-based compensation	76	307	293	530
Depreciation and amortization	2,560	2,398	5,097	4,604
Corporate Expenses
Non-cash stock-based compensation	1,100	778	2,133	1,530
Depreciation and amortization	153	329	242	654
Selling, General and Administrative Expenses
Depreciation and amortization	$ 1,301	$ 1,849	$ 2,614	$ 2,865