Consolidated Statement of Stockholders' Equity and Convertible Preferred Stock - USD ($) shares in Thousands, $ 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, 2019	117,329	137
Balance at Dec. 31, 2019	$ 12	$ (685)	$ 224,091	$ (133,701)	$ 48,084	$ 49,814	$ 0	$ 89,717
Share-based compensation			(155)					(155)
Restricted stock vesting (in shares)	612
Shares repurchased related to share-based compensation (in shares)	(112)	112
Shares repurchased related to share-based compensation		$ (346)						(346)
Preferred stock dividends			(14,327)		(7,310)	(6,967)	0	(14,327)
Preferred stock dividends			14,327		7,310	6,967	0	14,327
Deemed dividends - accretion of beneficial conversion feature			(128)		128			(128)
Net Loss	$ 0	$ 0	0	(14,329)	0	0	0	(14,329)
Balance (in shares) at Dec. 31, 2020	117,829	249
Balance at Dec. 31, 2020	$ 12	$ (1,031)	209,481	(148,030)	55,522	56,781	0	60,432
Share-based compensation	$ 0	$ 0	(4,541)	0	0	0	0	(4,541)
Restricted stock vesting (in shares)	660	0
Shares repurchased related to share-based compensation (in shares)	(97)	97
Shares repurchased related to share-based compensation	$ 0	$ (284)	0	0	0	0	0	(284)
Preferred stock dividends	0	0	(18,294)	0	(8,206)	(7,821)	(2,200)	(18,294)
Preferred stock dividends	0	0	18,294	0	8,206	7,821	2,200	18,294
Deemed dividends - accretion of beneficial conversion feature	0	0	(63)	0	63	0	0	(63)
Net Loss	0	0	0	(22,039)	0	0	0	(22,039)
Restricted stock vesting	$ 0	$ 0	0	0	0	0	0	0
Issuance of common stock, net (in shares)	163
Issuance of common stock, net			316				37,807	$ 316
Stock dividend (in shares)	798	0
Exercise of common stock warrants (in shares)	1,485							1,500
Exercise of common stock warrants			4,365					$ 4,365
Balance (in shares) at Dec. 31, 2021	120,838	346
Balance at Dec. 31, 2021	$ 12	$ (1,315)	$ 191,264	$ (170,069)	$ 63,791	$ 64,602	$ 40,007	$ 19,892