Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows used in operating activities
Net loss	$ (6,754)	$ (8,033)
Adjustments to reconcile net loss to net cash used in operating activities
Gain on settlement of debt		(26)
Deferred tax benefits	(164)	(161)
Unrealized loss on the fair value of investments in bonds held to maturity	67
Accretion of bond discount	(224)
Stock-based compensation	1,600	1,270
Stock issuance commitments		200
Provision for bad debt	64	19
Recovery of bad debt	(8)	(17)
Inventory valuation adjustments	480	404
Amortization of right-of-use assets, operating assets	276	152
Depreciation and amortization	913	1,424
Impairment on right-of-use assets	83	88
Changes in assets and liabilities
Accounts receivable	(1,400)	(803)
Inventories	(1,598)	(6,077)
Prepaid expenses and other current assets	(278)	1,695
Accounts payable	505	33
Accrued expenses	445	(1,555)
Accrued Directors Compensation	(5)
Operating lease obligations	(367)	(464)
Customer deposits and deferred revenue	373	84
Net cash used in operating activities	(5,992)	(11,767)
Cash flows used in investing activities
Cash used for investments held to maturity	(10,763)
Cash used in asset acquisition	(269)
Cash used for property and equipment	(502)	(352)
Net cash used in investing activities	(11,534)	(352)
Cash flows used in financing activities
Principal payments made on notes payable	(409)	(791)
Net cash used in financing activities	(409)	(791)
Effect of exchange rate changes on cash	(452)	1,155
Net decrease in cash and cash equivalents	(18,387)	(11,755)
Cash and cash equivalents, beginning of the period	25,627	36,231
Cash and cash equivalents, end of the period	7,240	24,476
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	11	9
Supplemental disclosure of non-cash information:
Assets acquired in asset acquisition	561
Liabilities assumed in asset acquisition	292
Notes payable	523	943
Common stock issued in connection with:
Settlement of accounts payable		54
Compensation awards previously accrued	200
ROU assets and operating lease obligations recognized (Note 6):
Operating lease assets recognized
Less: non-cash changes to operating lease assets
amortization	(276)	(152)
lease termination		(131)
impairments	(83)	(43)
loss on lease impairments	83	88
ROU assets and operating lease obligations recognized	(276)	(238)
Operating lease liabilities recognized
accretion	(367)	(464)
Operating lease liabilities recognized	$ (367)	$ (464)