CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Treasury Stock-Common [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Non-Redeemable Preferred Stock [Member]
Balance at Dec. 31, 2019	$ 247,327	$ 3,989	$ (13,266)	$ 195,972	$ 57,632	$ 3,000
Balance, shares at Dec. 31, 2019		39,901,000	(2,010,000)
Net income (loss)	(19,452)				(19,452)
Dividend accrued on redeemable preferred stock	(8,307)				(8,307)
Accretion of redeemable preferred stock	(504)				(504)
Stock-based compensation	495			495
Other	(64)	$ 2	$ 292	(358)
Other, Shares		19,000	30,000
Balance at Mar. 31, 2020	219,495	$ 3,991	$ (12,974)	196,109	29,369	3,000
Balance, Shares at Mar. 31, 2020		39,920,000	(1,980,000)
Balance at Dec. 31, 2019	247,327	$ 3,989	$ (13,266)	195,972	57,632	3,000
Balance, shares at Dec. 31, 2019		39,901,000	(2,010,000)
Net income (loss)	(40,219)
Balance at Sep. 30, 2020	181,268	$ 3,991	$ (12,884)	197,150	(9,989)	3,000
Balance, Shares at Sep. 30, 2020		39,926,000	(1,966,000)
Balance at Mar. 31, 2020	219,495	$ 3,991	$ (12,974)	196,109	29,369	3,000
Balance, shares at Mar. 31, 2020		39,920,000	(1,980,000)
Net income (loss)	(365)				(365)
Dividend accrued on redeemable preferred stock	(8,689)				(8,689)
Accretion of redeemable preferred stock	(505)				(505)
Stock-based compensation	684			684
Other			$ 90	(90)
Other, Shares		6,000	14,000
Balance at Jun. 30, 2020	210,620	$ 3,991	$ (12,884)	196,703	19,810	3,000
Balance, Shares at Jun. 30, 2020		39,926,000	(1,966,000)
Net income (loss)	(20,402)				(20,402)
Dividend accrued on redeemable preferred stock	(8,889)				(8,889)
Accretion of redeemable preferred stock	(508)				(508)
Stock-based compensation	447			447
Balance at Sep. 30, 2020	181,268	$ 3,991	$ (12,884)	197,150	(9,989)	3,000
Balance, Shares at Sep. 30, 2020		39,926,000	(1,966,000)
Balance at Dec. 31, 2020	149,643	$ 3,991	$ (13,213)	197,352	(41,487)	3,000
Balance, shares at Dec. 31, 2020		39,926,000	(2,075,000)
Net income (loss)	(13,279)				(13,279)
Dividend accrued on redeemable preferred stock	(9,511)				(9,511)
Accretion of redeemable preferred stock	(511)				(511)
Stock-based compensation	713			713
Restricted stock granted from treasury stock		$ 25	$ 5,310	(5,335)
Restricted stock granted from treasury stock, shares		250,000	835,000
Other	(18)		$ (18)
Other, Shares			(5,000)
Balance at Mar. 31, 2021	127,037	$ 4,016	$ (7,921)	192,730	(64,788)	3,000
Balance, Shares at Mar. 31, 2021		40,176,000	(1,245,000)
Balance at Dec. 31, 2020	149,643	$ 3,991	$ (13,213)	197,352	(41,487)	3,000
Balance, shares at Dec. 31, 2020		39,926,000	(2,075,000)
Net income (loss)	$ 1,463
Restricted stock granted from treasury stock, shares	300,000
Balance at Sep. 30, 2021	$ 423,068	$ 8,983	$ (6,561)	489,107	(71,461)	3,000
Balance, Shares at Sep. 30, 2021		89,842,000	(1,018,000)
Balance at Mar. 31, 2021	127,037	$ 4,016	$ (7,921)	192,730	(64,788)	3,000
Balance, shares at Mar. 31, 2021		40,176,000	(1,245,000)
Net income (loss)	23,670				23,670
Dividend accrued on redeemable preferred stock	(10,213)				(10,213)
Accretion of redeemable preferred stock	(513)				(513)
Stock-based compensation	1,062			1,062
Unrestricted stock granted from treasury stock		$ 8	$ 1,700	(1,708)
Unrestricted stock granted from treasury stock, shares		80,000	267,000
Other	(28)		$ (28)
Other, Shares			(5,000)
Balance at Jun. 30, 2021	141,015	$ 4,024	$ (6,249)	192,084	(51,844)	3,000
Balance, Shares at Jun. 30, 2021		40,256,000	(983,000)
Net income (loss)	(8,928)				(8,928)
Issuance of common stock in exchange for redeemable preferred stocks	531,139	$ 4,907		526,232
Issuance of common stock in exchange for redeemable preferred stocks, shares		49,066,000
Deemed dividend on redeemable preferred stocks	(231,812)			(231,812)
Dividend accrued on redeemable preferred stock	(10,190)				(10,190)
Accretion of redeemable preferred stock	(499)				(499)
Stock-based compensation	2,553			2,553
Issuance of restricted and unrestricted stock		$ 52		(52)
Issuance of restricted and unrestricted stock, shares		520,000
Other	(210)		$ (312)	102
Other, Shares			(35,000)
Balance at Sep. 30, 2021	$ 423,068	$ 8,983	$ (6,561)	$ 489,107	$ (71,461)	$ 3,000
Balance, Shares at Sep. 30, 2021		89,842,000	(1,018,000)