Consolidated Statements of Stockholders' Deficit - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2016	21,768,864
Balance at Dec. 31, 2016	$ 218	$ 355,336	$ (409,871)	$ (54,317)
Issuance of shares (in shares)	293,802
Issuance of shares	$ 3	3,731		3,734
Issuance of shares pursuant to bond conversions (in shares)	413,335
Issuance of shares pursuant to bond conversions	$ 4	2,821		2,825
Stock compensation expense (in shares)	511,433
Stock compensation expense	$ 5	2,918		2,923
Net Loss			(33,864)	(33,864)
Balance (in shares) at Dec. 31, 2017	22,987,434
Balance at Dec. 31, 2017	$ 230	364,806	(443,735)	(78,699)
Issuance of shares (in shares)	1,256,824
Issuance of shares	$ 13	15,490		$ 15,503
Issuance of shares pursuant to bond conversions (in shares)	376,463			376,463
Issuance of shares pursuant to bond conversions	$ 4	2,752		$ 2,756
Stock compensation expense (in shares)	34,190
Stock compensation expense		473		473
Net Loss			(26,273)	(26,273)
Balance (in shares) at Dec. 31, 2018	24,654,911
Balance at Dec. 31, 2018	$ 247	$ 383,521	$ (470,008)	$ (86,240)