Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities
Net loss	$ (2,698)	$ (1,885)
Adjustments to reconcile net loss to net cash used by operating activities:
Depreciation and amortization	6	18
Amortization of debt discount	29	0
Loss on disposal of fixed assets	0	82
Stock-based compensation	592	78
Issuance of common stock as compensation in lieu of cash	0	21
Loss on extinguishment of derivative liability, net	0	335
(Gain) loss on change in fair value of derivative liabilities	667	(1,172)
Change in assets and liabilities:
Accounts receivable	69	84
Inventory	1	(48)
Other assets	104	(495)
Operating lease right-of-use assets	(78)	(10)
Accounts payable	100	(33)
Deferred revenue	(249)	(129)
Accrued expense	37	(123)
Pension obligation	(21)	(13)
Total adjustments	1,257	(1,405)
Net cash used in operating activities	(1,441)	(3,290)
Cash flows from investing activities
Purchase of property and equipment	0	(53)
Net cash used in investing activities	0	(53)
Cash flows from financing activities
Proceeds from issuance of notes payable	1,050	0
Net cash provided by financing activities	1,050	0
Effect of exchange rate changes on cash and cash equivalents	21	54
Net decrease in cash and cash equivalents	(370)	(3,289)
Cash and cash equivalents at beginning of period	1,202	8,345
Cash and cash equivalents at end of period	832	5,056
Supplemental disclosure of cash flow information:
Cash paid for interest	0	0
Cash paid for income taxes	0	0
Conversion of Series A Preferred to Common Stock [Member]
Summary of non-cash investing and financing activities:
Conversion of Preferred Stock into Common Stock	0	438
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	0	443
Series A Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	0	92
Series A-1 Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	0	83
Series D Preferred Stock [Member]
Summary of non-cash investing and financing activities:
Stock dividends	253	248
Accretion of discount on Convertible Redeemable Preferred Stock	$ 1,531	$ 1,817