Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Series B Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2019	$ 778	$ 10	$ 340,228		$ (328,109)	$ 12,907
Beginning balance, shares at Dec. 31, 2019		10,386,754
Common stock issuance, net of costs		$ 18	25,746			25,764
Common stock issuances, net of costs, shares		17,628,996
Warrant modification			46			46
Shares issued to pay accounts payable			10			10
Shares issued to pay accounts payable, shares		4,762
Equity-based compensation			196			196
Series B preferred shares converted to common shares	(9)		9
Comprehensive loss				(4)	(3,790)	(3,794)
Ending balance, value at Mar. 31, 2020	769	$ 28	366,235	(4)	(331,899)	35,129
Ending balance, shares at Mar. 31, 2020		28,020,512
Beginning balance, value at Dec. 31, 2019	778	$ 10	340,228		(328,109)	12,907
Beginning balance, shares at Dec. 31, 2019		10,386,754
Comprehensive loss						(7,097)
Ending balance, value at Jun. 30, 2020	737	$ 34	381,427	63	(335,269)	46,992
Ending balance, shares at Jun. 30, 2020		34,250,615
Beginning balance, value at Dec. 31, 2019	778	$ 10	340,228		(328,109)	12,907
Beginning balance, shares at Dec. 31, 2019		10,386,754
Ending balance, value at Dec. 31, 2020	732	$ 42	402,541	(47)	(341,974)	61,294
Ending balance, shares at Dec. 31, 2020		42,154,371
Beginning balance, value at Mar. 31, 2020	769	$ 28	366,235	(4)	(331,899)	35,129
Beginning balance, shares at Mar. 31, 2020		28,020,512
Common stock issuance, net of costs		$ 6	15,010			15,016
Common stock issuances, net of costs, shares		6,230,103
Equity-based compensation			150			150
Series B preferred shares converted to common shares	(32)		32
Comprehensive loss				67	(3,370)	(3,303)
Ending balance, value at Jun. 30, 2020	737	$ 34	381,427	63	(335,269)	46,992
Ending balance, shares at Jun. 30, 2020		34,250,615
Beginning balance, value at Dec. 31, 2020	732	$ 42	402,541	(47)	(341,974)	61,294
Beginning balance, shares at Dec. 31, 2020		42,154,371
Common stock issuance, net of costs		$ 6	12,881			12,887
Common stock issuances, net of costs, shares		5,678,626
Equity-based compensation			526			526
Series B preferred shares converted to common shares	(7)		7
Comprehensive loss				(163)	(3,579)	(3,742)
Ending balance, value at Mar. 31, 2021	725	$ 48	415,955	(210)	(345,553)	70,965
Ending balance, shares at Mar. 31, 2021		47,832,997
Beginning balance, value at Dec. 31, 2020	732	$ 42	402,541	(47)	(341,974)	61,294
Beginning balance, shares at Dec. 31, 2020		42,154,371
Comprehensive loss						(9,655)
Ending balance, value at Jun. 30, 2021	725	$ 48	416,435	(247)	(351,429)	65,532
Ending balance, shares at Jun. 30, 2021		47,832,997
Beginning balance, value at Mar. 31, 2021	725	$ 48	415,955	(210)	(345,553)	70,965
Beginning balance, shares at Mar. 31, 2021		47,832,997
Equity-based compensation			480			480
Comprehensive loss				(37)	(5,876)	(5,913)
Ending balance, value at Jun. 30, 2021	$ 725	$ 48	$ 416,435	$ (247)	$ (351,429)	$ 65,532
Ending balance, shares at Jun. 30, 2021		47,832,997