Consolidated Statement of Stockholders' Equity and Convertible Preferred Stock (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Series A Convertible Preferred Stock [Member]	Series B Convertible Preferred Stock [Member]	Series C Convertible Preferred Stock [Member]	Total
Balance (in shares) at Dec. 31, 2020	117,829,000	249,000
Balance at Dec. 31, 2020	$ 12	$ (1,031)	$ 209,481	$ (148,030)	$ 55,522	$ 56,781	$ 0	$ 60,432
Share-based compensation			(2,146)					(2,146)
Restricted stock vesting (in shares)	305,000
Shares repurchased related to share-based compensation (in shares)	(51,000)	51,000
Shares repurchased related to share-based compensation		$ (140)						(140)
Issuance of common stock, net							33,173
Preferred stock dividends			(7,751)		3,956	3,768	0	(7,751)
Net income	$ 0	$ 0	0	(15,238)	0	0	0	(15,238)
Balance (in shares) at Jun. 30, 2021	118,482,000	300,000
Balance at Jun. 30, 2021	$ 12	$ (1,171)	199,553	(163,268)	59,509	60,549	33,173	35,126
Balance (in shares) at Mar. 31, 2021	118,342,000	269,000
Balance at Mar. 31, 2021	$ 12	$ (1,075)	202,176	(151,688)	57,516	58,665	23,629	49,425
Share-based compensation			1,268					1,268
Restricted stock vesting (in shares)	171,000
Shares repurchased related to share-based compensation (in shares)	(31,000)	31,000
Shares repurchased related to share-based compensation		$ (96)						(96)
Issuance of common stock, net							9,544
Preferred stock dividends			(3,876)		1,978	1,884	0	(3,876)
Net income	$ 0	$ 0	0	(11,580)	0	0	0	(11,580)
Balance (in shares) at Jun. 30, 2021	118,482,000	300,000
Balance at Jun. 30, 2021	$ 12	$ (1,171)	199,553	(163,268)	59,509	60,549	33,173	35,126
Balance (in shares) at Dec. 31, 2021	120,838,000	346,000
Balance at Dec. 31, 2021	$ 12	$ (1,315)	191,264	(170,069)	63,791	64,602	40,007	19,892
Share-based compensation			515					515
Restricted stock vesting (in shares)	1,673,000
Shares repurchased related to share-based compensation (in shares)	(396,000)	396,000
Shares repurchased related to share-based compensation		$ (1,752)						(1,752)
Issuance of common stock, net (in shares)	4,618,000
Issuance of common stock, net	$ 1		29,935				9,836	29,936
Exercise of common stock warrants (in shares)	521,000	0
Exercise of common stock warrants	$ 0	$ 0	3,564	0	0	0	0	3,564
Preferred stock dividends			(11,529)		4,468	4,261	2,761	(11,529)
Net income	$ 0	$ 0	0	(22,349)	0	0	0	(22,349)
Balance (in shares) at Jun. 30, 2022	127,254,000	742,000
Balance at Jun. 30, 2022	$ 13	$ (3,067)	213,749	(192,418)	68,259	68,863	52,604	18,277
Balance (in shares) at Mar. 31, 2022	121,554,000	541,000
Balance at Mar. 31, 2022	$ 12	$ (1,779)	183,138	(181,506)	66,016	66,725	51,230	(135)
Share-based compensation			2,886					2,886
Restricted stock vesting (in shares)	762,000
Shares repurchased related to share-based compensation (in shares)	(201,000)	201,000
Shares repurchased related to share-based compensation		$ (1,288)						(1,288)
Issuance of common stock, net (in shares)	4,618,000	0
Issuance of common stock, net	$ 1	$ 0	29,935	0	0	0	0	$ 29,936
Exercise of common stock warrants (in shares)	521,000	0						520,335
Exercise of common stock warrants	$ 0	$ 0	3,564	0	0	0	0	$ 3,564
Preferred stock dividends			(5,774)		2,243	2,138	1,374	(5,774)
Net income	$ 0	$ 0	0	(10,912)	0	0	0	(10,912)
Balance (in shares) at Jun. 30, 2022	127,254,000	742,000
Balance at Jun. 30, 2022	$ 13	$ (3,067)	$ 213,749	$ (192,418)	$ 68,259	$ 68,863	$ 52,604	$ 18,277