Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net income (loss)	$ 9,282,000	$ (7,253,000)
Adjustments to reconcile net income (loss) to net cash used by operating activities:
Depreciation and amortization	56,000	72,000
Loss on disposal of fixed assets	82,000	0
Loss on abandonment of patents	50,000	0
Loss on extinguishment of derivative liabilities, net	311,000	0
Deferred stock issuance costs	364,000
Stock-based compensation	1,528,000	862,000
Stock issued in lieu of cash as compensation for services	58,000	0
Application of rent deposit in lieu of cash payments	0	124,000
Gain on extinguishment of debt	(1,581,000)
(Gain) on change in fair value of derivative liabilities	(18,809,000)	(2,252,000)
Impairment loss on lease abandonment	333,000	0
Change in assets and liabilities
Accounts receivable	194,000	81,000
Inventory	14,000	576,000
Other assets	(69,000)	33,000
Operating lease right-of-use assets	(44,000)	(20,000)
Accounts payable	(170,000)	491,000
Accrued expense	401,000	(175,000)
Deferred revenue	300,000	(726,000)
Pension obligation	(37,000)	178,000
Total adjustments	(17,019,000)	(756,000)
Net cash used by operating activities	(7,737,000)	(8,009,000)
Cash flows from investing activities
Purchase of property and equipment	(53,000)	0
Net cash used by investing activities	(53,000)	0
Cash flows from financing activities
Proceeds from issuance of common stock, net	100,000	2,296,000
Proceeds from issuance of notes payable, net	523,000	4,658,000
Repayment of notes payable	0	(575,000)
Proceeds from issuance of preferred stock, net of issuance costs	0	9,147,000
Dividends paid to preferred stockholders	(51,000)	(51,000)
Net cash provided by financing activities	572,000	15,475,000
Effect of exchange rate changes on cash and cash equivalents	75,000	(151,000)
Net (decrease) increase in cash and cash equivalents	(7,143,000)	7,315,000
Cash and cash equivalents at beginning of year	8,345,000	1,030,000
Cash and cash equivalents at end of year	1,202,000	8,345,000
Supplemental disclosure of cash flow information:
Cash paid for interest	0	52,000
Cash paid for income taxes	0	0
Summary of non-cash investing and financing activities:
Issuance of common stock for financing facility	70,000	400,000
Conversion of bridge loan into Series D Convertible Redeemable Preferred Stock	0	2,187,000
Conversion of related party notes payable and accrued interest into Series D Convertible Redeemable Preferred Stock	0	334,000
Recognition of derivative liabilities on preferred stock issuance	557,000	26,011,000
Deemed dividend from holder on preferred stock extinguishment and modification	0	6,136,000
Exchange of Series C Convertible Redeemable Preferred Stock for Series D Convertible Redeemable Preferred Stock	0	10,000,000
Reduction in additional minimum pension liability	518,000	97,000
Conversion of Series A Preferred to Common Stock [Member]
Summary of non-cash investing and financing activities:
Conversion of Preferred Stock into Common Stock	745,000	190,000
Conversion of Series A-1 Preferred to Common Stock [Member]
Summary of non-cash investing and financing activities:
Conversion of Preferred Stock into Common Stock	739,000	186,000
Series A Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	132,000	1,849,000
Series A-1 Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	122,000	93,000
Series C Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	0	690,000
Accretion of discount on Convertible Redeemable Preferred Stock	0	1,116,000
Series D Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	999,000	142,000
Accretion of discount on Convertible Redeemable Preferred Stock	$ 6,806,000	$ 1,572,000