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BALANCE SHEET COMPONENTS (Tables)

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of accounts receivable, net and activity in allowance for uncollectible accounts

Accounts receivable, net consisted of the following (in thousands):

			June 30, 2026						December 31, 2025
Accounts receivable			$	363					$	219
Allowance for uncollectible accounts			(2)						(18)
Accounts receivable, net			$	361					$	201

The following was the activity in the allowance for uncollectible accounts (in thousands):

			Three Months Ended June 30,												Six Months Ended June 30,
			2026						2025						2026						2025
Balance as of beginning of period			$	8					$	4					$	18					$	4
Increase in provision			—						6						5						6
Amounts written off, less recoveries			(6)						—						(21)						—
Balance as of end of period			$	2					$	10					$	2					$	10

Schedule of inventory, net and activity in reserve for obsolescence

Inventory consisted of the following (in thousands):

			June 30, 2026						December 31, 2025
Raw materials			$	719					$	726
Work in progress			1						—
Finished goods			249						268
Total inventory			$	969					$	994

Schedule of prepaid expenses

Prepaid expenses and other current assets consisted of the following (in thousands):

			June 30, 2026						December 31, 2025
Software licenses			$	76					$	127
Equity offering costs			134						29
Insurance			55						47
Rent			32						32
Marketing programs and conferences			12						25
Professional services			15						14
Other			49						23
Total prepaid expenses and other current assets			$	373					$	297

Schedule of property and equipment, net

Property and equipment, net consisted of the following (in thousands):

			June 30, 2026						December 31, 2025
Research and development equipment			$	1,291					$	1,291
Office and computer equipment			84						84
Autos			54						54
Furniture and fixtures			47						47
Leasehold improvements			105						105
Total in service			1,581						1,581
Accumulated depreciation and amortization			(1,233)						(1,171)
Property and equipment, net			$	348					$	410

Schedule of accrued expenses

Accrued expenses consisted of the following (in thousands):

			June 30, 2026						December 31, 2025
Compensation and related benefits			$	450					$	313
Legal and consulting professional services			3						66
Product warranty and other			11						4
Total accrued expenses			$	464					$	383

Schedule of maturities of notes payable

As of June 30, 2026, future principal payments were as follows (in thousands):

2026						$	31
2027						68
2028						65
2029						12
Total principal payments						176
Less: current portion of notes payable						(65)
Notes payable, less current portion						$	111

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- Definition

Tabular disclosure of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer; the aggregate carrying amount of current assets, not separately presented elsewhere in the balance sheet; and other deferred costs.

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- Definition

Tabular disclosure of property, plant, and equipment. Includes, but is not limited to, land and land improvement; building; machinery and equipment; furniture and fixture; and work of art, historical treasure, or similar asset classified as collection.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 360
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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- Definition

Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-3

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-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
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Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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-Name Accounting Standards Codification
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Tabular disclosure of maturity and sinking fund requirement for long-term debt.

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