Condensed Consolidated Statements of Changes in Stockholders' Equity (Deficit) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings
Balance at Dec. 31, 2018	$ 13,332	$ 7	$ 321,753	$ (997)	$ (307,431)
Balance (in shares) at Dec. 31, 2018		71,182,016		(253,598)
Stock-based compensation	6,333		6,333
Stock-based compensation (in shares)		3,260,275
Common stock withheld for taxes on stock-based compensation	(452)		(452)
Common stock withheld for taxes on stock-based compensation (in shares)		(286,965)
Common stock issued for extinguishment of debt	32,990	$ 2	32,988
Gain on extinguishment of debt	7,078		7,078
Dividends on preferred stock	(18,385)		(18,385)
Net loss	(45,371)				(45,371)
Balance at Sep. 30, 2019	(4,475)	$ 9	349,315	$ (997)	(352,802)
Balance (in shares) at Sep. 30, 2019		91,796,964		(253,598)
Common stock issued for extinguishment of debt (in shares)		17,641,638
Balance at Jun. 30, 2019	22,829	$ 9	356,210	$ (997)	(332,393)
Balance (in shares) at Jun. 30, 2019		91,451,836		(253,598)
Stock-based compensation	332		332
Stock-based compensation (in shares)		422,789
Common stock withheld for taxes on stock-based compensation	(42)		(42)
Common stock withheld for taxes on stock-based compensation (in shares)		(77,661)
Dividends on preferred stock	(7,185)		(7,185)
Net loss	(20,409)				(20,409)
Balance at Sep. 30, 2019	(4,475)	$ 9	349,315	$ (997)	(352,802)
Balance (in shares) at Sep. 30, 2019		91,796,964		(253,598)
Balance at Dec. 31, 2019	(238,158)	$ 9	342,382	$ (997)	(579,552)
Balance (in shares) at Dec. 31, 2019		91,584,460		(253,598)
Stock-based compensation	1,342	$ 1	1,341
Stock-based compensation (in shares)		3,645,559
Common stock withheld for taxes on stock-based compensation	(39)		(39)
Common stock withheld for taxes on stock-based compensation (in shares)		(132,100)
Dividends on preferred stock	(14,506)		(14,506)
Net loss	(103,558)				(103,558)
Balance at Sep. 30, 2020	(354,919)	$ 10	329,178	$ (997)	(683,110)
Balance (in shares) at Sep. 30, 2020		95,097,919		(253,598)
Balance at Jun. 30, 2020	(280,628)	$ 10	329,066	$ (997)	(608,707)
Balance (in shares) at Jun. 30, 2020		95,097,919		(253,598)
Stock-based compensation	114		114
Common stock withheld for taxes on stock-based compensation	(2)		(2)
Net loss	(74,403)				(74,403)
Balance at Sep. 30, 2020	$ (354,919)	$ 10	$ 329,178	$ (997)	$ (683,110)
Balance (in shares) at Sep. 30, 2020		95,097,919		(253,598)