Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Net revenues	$ 3,029,000	$ 2,201,000	$ 5,692,000	$ 3,718,000
Cost of revenues	2,090,000	1,215,000	3,813,000	2,024,000
Gross profit	939,000	986,000	1,879,000	1,694,000
Expenses:
Selling, general and administrative	1,989,000	3,502,000	3,682,000	5,494,000
Research and development	392,000	622,000	847,000	1,001,000
Total operating expenses	2,381,000	4,124,000	4,529,000	6,495,000
Loss from operations	(1,442,000)	(3,138,000)	(2,650,000)	(4,801,000)
Other expenses:
Interest expense	(1,359,000)	(1,524,000)	(2,182,000)	(3,043,000)
Other income (expenses)		(10,000)	(4,000)	(11,000)
Gain on extinguishment of debt				(652,000)
Total other expense	(1,359,000)	(1,534,000)	(2,186,000)	(2,402,000)
Net loss	(2,801,000)	(4,672,000)	(4,836,000)	(7,203,000)
Loss attributable to noncontrolling interests	(113,000)	(133,000)	(239,000)	(251,000)
Net loss attributable to common stockholders	(2,688,000)	(4,539,000)	(4,597,000)	(6,952,000)
Net loss	(2,801,000)	(4,672,000)	(4,836,000)	(7,203,000)
Other comprehensive loss:
Foreign currency translation adjustments gain (loss)	31,000	12,000	45,000	13,000
Comprehensive loss	(2,770,000)	(4,660,000)	(4,791,000)	(7,190,000)
Comprehensive loss attributable to noncontrolling interests	(113,000)	(133,000)	(239,000)	(251,000)
Comprehensive loss attributable to common stockholders	$ (2,657,000)	$ (4,527,000)	$ (4,552,000)	$ (6,939,000)
Per share data:
Basic and diluted net loss per common share (in dollars per share)	$ (0.20)	$ (0.38)	$ (0.36)	$ (0.59)
Weighted average common shares outstanding – basic and diluted (in shares)	13,463,137	11,911,784	12,879,072	11,679,075