Condensed Consolidated Statements of Equity (Unaudited) - USD ($)	At The Market Offering Agreement [Member] Common Stock [Member]	At The Market Offering Agreement [Member] Additional Paid-in Capital [Member]	At The Market Offering Agreement [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	[1]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2020				8,934,952
Balance at Dec. 31, 2020				$ 9,000	$ 259,058,000	$ (253,283,000)	$ 16,000		$ 70,000	$ 5,870,000
Stock-based compensation expense					258,000					258,000
Issuance of common stock via at-the-market offering, net (in shares)				2,976,832
Issuance of common stock via at-the-market offering, net				$ 3,000	6,829,000					6,832,000
Foreign currency translation gain (loss)							1,000			1,000
Net loss						(2,413,000)			(118,000)	(2,531,000)
Balance (in shares) at Mar. 31, 2021				11,911,784
Balance at Mar. 31, 2021				$ 12,000	266,145,000	(255,696,000)	17,000		(48,000)	10,430,000
Balance (in shares) at Dec. 31, 2021				11,911,784
Balance at Dec. 31, 2021				$ 12,000	268,447,000	(264,662,000)	31,000		(431,000)	3,397,000
Adoption of ASU 2020-06					(10,681,000)	9,739,000				(942,000)
Stock-based compensation expense					42,000					42,000
Issuance of common stock via at-the-market offering, net (in shares)	918,093
Issuance of common stock via at-the-market offering, net	$ 1,000	$ 593,000	$ 594,000
Related party convertible note price reset					213,000					213,000
Foreign currency translation gain (loss)							14,000			14,000
Net loss						(1,910,000)			(126,000)	(2,036,000)
Balance (in shares) at Mar. 31, 2022				12,829,877
Balance at Mar. 31, 2022				$ 13,000	$ 258,614,000	$ (256,833,000)	$ 45,000		$ (557,000)	$ 1,282,000

[1] Accumulated other comprehensive loss.