Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities
Net loss	$ (2,877,000)	$ (3,668,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock option compensation expense	1,117,000	1,017,000
Common stock issued in lieu of salary to officers and fees for services from vendors	76,000	171,000
Common stock issued for interest	0	16,000
Interest expense related to amortization of the discount on convertible notes payable and line of credit	8,000	110,000
PPP loan forgiveness	(174,000)	(43,000)
Loss on investment in South Korean joint venture	15,000	23,000
Depreciation expense	6,000	12,000
Changes in assets and liabilities:
Accounts receivable	(66,000)	141,000
Prepaid expenses and other current assets	4,000	(62,000)
Inventories	(15,000)	15,000
Customer deposits	58,000	81,000
Deferred revenue	(89,000)	91,000
Net cash used in operating activities	(1,864,000)	(2,054,000)
Cash flows from investing activities
Purchase of equipment	(101,000)	(21,000)
Net cash used in investing activities	(101,000)	(21,000)
Cash flows from financing activities
Proceeds from sales of common stock	2,150,000	3,520,000
Proceeds Clyra Medical convertible note	100,000	0
Payment of debt obligations	0	(828,000)
Payment of Clyra Medical debt obligations	(10,000)	(24,000)
Net cash provided by financing activities	2,240,000	2,718,000
Net effect of foreign currency translation	(11,000)	(2,000)
Net change in cash	264,000	641,000
Cash at beginning of period	962,000	716,000
Cash at end of period	1,226,000	1,357,000
Supplemental disclosures of cash flow information
Interest	7,000	33,000
Income taxes	0	0
Non-cash investing and financing activities
Fair value of warrants issued with convertible notes	0	35,000
Conversion of notes payable to common stock	0	328,000
Allocation of noncontrolling interest	631,000	627,000
Clyra Medical Common Stock [Member]
Cash flows from financing activities
Proceeds from sales of common stock	0	50,000
Entities, Excluding Partially Owned Subsidiary [Member]
Changes in assets and liabilities:
Accounts payable and accrued expenses	105,000	(182,000)
Accounts payable and accrued expenses	105,000	(182,000)
Partially Owned Subsidiary [Member]
Changes in assets and liabilities:
Accounts payable and accrued expenses	(32,000)	224,000
Accounts payable and accrued expenses	$ (32,000)	$ 224,000