Condensed Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands		Cumulative Effect, Period of Adoption, Adjustment [Member] Common Stock [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Additional Paid-in Capital [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] AOCI Attributable to Parent [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Preferred Class A [Member] Common Stock [Member]	Preferred Class A [Member] Preferred Stock [Member]	Preferred Class A [Member] Additional Paid-in Capital [Member]	Preferred Class A [Member] AOCI Attributable to Parent [Member]	Preferred Class A [Member]	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2018											24,654,911
Balance (Accounting Standards Update 2017-11 [Member]) at Dec. 31, 2018	[1]		$ 2,896	$ (2,031)	$ 865
Balance at Dec. 31, 2018											$ 247		$ 383,521	$ (470,008)	$ (86,240)
Issuance of shares pursuant to bond conversion (in shares)											485,020
Issuance of shares pursuant to bond conversion											$ 5		3,199		3,204
Stock-based Compensation expense (in shares)											17,307
Stock-based Compensation expense													122		122
Issuance of shares (in shares)											782,814
Issuance of shares											$ 7		7,884		7,891
Issuance of shares											7		7,884		7,891
Net loss and comprehensive loss														(7,260)	(7,260)
Balance (in shares) at Mar. 31, 2019											25,940,052
Balance at Mar. 31, 2019											$ 259		397,622	(479,299)	(81,418)
Balance (in shares) at Dec. 31, 2019											28,480,567
Balance at Dec. 31, 2019											$ 285		419,194	(501,597)	$ (82,118)
Issuance of shares pursuant to bond conversion (in shares)											5,766,337				5,766,337
Issuance of shares pursuant to bond conversion											$ 57		38,843		$ 38,900
Stock-based Compensation expense (in shares)											116,134
Stock-based Compensation expense											$ 1		1,250		1,251
Issuance of shares (in shares)							10,000				408,992
Issuance of shares							$ 1	$ 39,735		$ 39,736	$ 4		3,919		3,923
Reclassification of warrant liability													(865)		(865)
Issuance of shares							$ 1	$ 39,735		$ 39,736	4		3,919		3,923
Net loss and comprehensive loss														(20,514)	(20,514)
Balance (in shares) at Mar. 31, 2020											34,772,030	10,000
Balance at Mar. 31, 2020											$ 347	$ 1	$ 502,076	$ (522,111)	$ (19,687)

[1] A cumulative effect adjustment of $2,031 thousand was recognized as of January 1, 2019, upon adoption of ASU 2017-11.