Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Net revenues	$ 1,517,000	$ 3,200,000
Cost of revenues	809,000	1,708,000
Gross profit	708,000	1,492,000
Expenses:
Selling, general and administrative	1,992,000	2,092,000
Research and development	379,000	609,000
Total operating expenses	2,371,000	2,701,000
Loss from operations	(1,663,000)	(1,209,000)
Other income (expenses):
Interest expense	(1,519,000)	(3,531,000)
Other income (expenses)	(1,000)	(3,000)
Gain on extinguishment of debt	652,000
Total other expenses	(868,000)	(3,534,000)
Net loss	(2,531,000)	(4,743,000)
Loss attributable to noncontrolling interests	(118,000)	(141,000)
Net loss attributable to common stockholders	(2,413,000)	(4,602,000)
Net loss	(2,531,000)	(4,743,000)
Other comprehensive loss:
Foreign currency translation gain	1,000	38,000
Comprehensive loss	(2,530,000)	(4,705,000)
Comprehensive loss attributable to noncontrolling interests	(118,000)	(141,000)
Comprehensive loss attributable to common stockholders	$ (2,412,000)	$ (4,564,000)
Per share data:
Basic and diluted net loss per common share (in dollars per share)	$ (0.21)	$ (1.11)
Weighted average common shares outstanding basic and diluted (in shares)	11,446,366	4,135,644