Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net loss	$ (5,369)	$ (9,689)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	17	114
Amortization of intangible assets		33
Impairment of long-lived assets		777
Gain on extinguishment of debt	(429)
Gain on disposal of assets, net		(33)
Stock-based compensation	169	656
Bad debt expense	61	450
Provision for inventory excess and obsolescence	140	101
Deferred income tax		1
Gain on changes in fair value of liability warrants	(46)	(3,850)
Offering cost		298
Other noncash items	2	12
Change in operating assets and liabilities:
Accounts and other receivables	256	(422)
Inventory	667	307
Prepaid expenses and other current assets	119	(329)
Accounts payable and accrued liabilities	673	(2,764)
Warranty liability		(182)
Other		17
Net cash used in operating activities	(3,740)	(14,503)
Cash flows from investing activities:
Capital expenditures		(43)
Proceeds from sale of capital assets		33
Cash used in investing activities:		(10)
Cash flows from financing activities:
Proceeds from sale and issuance of securities		12,451
Exercise of warrants	24
Payments of equity issuance costs		(338)
Net cash provided by financing activities	24	12,113
Effect of currency exchange rate changes on cash and cash equivalents		(6)
Net change in cash, cash equivalents and restricted cash	(3,716)	(2,406)
Cash, cash equivalents and restricted cash at beginning of period	4,559	3,955
Cash, cash equivalents and restricted cash at end of period	843	1,549
Supplemental disclosure:
Cash paid for income taxes	$ 12	$ 2