Consolidated Statements of Operations (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Direct operating expenses	$ 22,140	$ 29,655	$ 48,819	$ 58,585
Non-cash stock-based compensation			1,592	1,635
Depreciation and amortization	3,873	4,306	8,385	8,222
Related Parties
Direct operating expenses	1,386	2,007	3,605	3,969
Depreciation and amortization	307	307	614	615
Direct Operating Expenses
Non-cash stock-based compensation	104	116	235	250
Depreciation and amortization	2,800	2,968	5,931	5,462
Corporate Expenses
Non-cash stock-based compensation	699	719	1,357	1,385
Depreciation and amortization	182	162	355	315
Selling, General and Administrative Expenses
Depreciation and amortization	$ 891	$ 1,176	$ 2,099	$ 2,445

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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