Consolidated Statements of Operations (Parenthetical) (Unaudited) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Direct operating expenses	$ 24,178	$ 30,807	$ 72,997	$ 89,392
Non-cash stock-based compensation			2,408	2,454
Depreciation and amortization	3,934	4,190	12,319	12,412
Related Parties
Direct operating expenses	2,263	2,048	5,868	6,017
Depreciation and amortization	306	306	920	921
Direct Operating Expenses
Non-cash stock-based compensation	148	74	383	324
Depreciation and amortization	2,753	2,888	8,684	8,350
Corporate Expenses
Non-cash stock-based compensation	668	745	2,025	2,130
Depreciation and amortization	180	168	534	483
Selling, General and Administrative Expenses
Depreciation and amortization	$ 1,001	$ 1,134	$ 3,101	$ 3,579

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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