Consolidated Statement of Stockholders' Equity, Series A and Series B Convertible Preferred Stock (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Treasury Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Series A Convertible Preferred Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Series B Convertible Preferred Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Series A Convertible Preferred Stock [Member]	Series B Convertible Preferred Stock [Member]	Total
Balance (in shares) at Dec. 31, 2018									106,856	6
Balance (Accounting Standards Update 2016-02 [Member]) at Dec. 31, 2018				$ (213)				$ (213)
Balance (Accounting Standards Update 2018-07 [Member]) at Dec. 31, 2018			$ 2,116					$ 2,116
Balance at Dec. 31, 2018									$ 11	$ (35)	$ 180,862	$ (97,617)		$ 40,091	$ 26,159	$ 83,221
Share-based compensation											5,884					5,884
Restricted stock vesting (in shares)									180
Restricted stock vesting											495					495
Shares repurchased related to share-based compensation (in shares)									(65)	65
Shares repurchased related to share-based compensation										$ (260)						(260)
Preferred stock dividends											(4,972)			3,133	1,819	(4,972)
Deemed dividends - accretion of beneficial conversion feature											(551)			551		(551)
Net income												(12,043)				(12,043)
Balance (in shares) at Mar. 31, 2019									106,971	71
Balance at Mar. 31, 2019									$ 11	$ (295)	183,834	(109,873)		43,775	27,978	73,677
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	89,717
Share-based compensation											(1,600)					(1,600)
Restricted stock vesting (in shares)									70
Restricted stock vesting
Shares repurchased related to share-based compensation (in shares)									(11)	11
Shares repurchased related to share-based compensation										$ (57)						(57)
Preferred stock dividends											(3,443)			1,757	1,673	(3,443)
Deemed dividends - accretion of beneficial conversion feature											(76)			76		(76)
Net income												902				902
Balance (in shares) at Mar. 31, 2020									117,388	148
Balance at Mar. 31, 2020									$ 12	$ (742)	$ 218,972	$ (132,799)		$ 49,917	$ 51,487	$ 85,443