Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Cash and Cash Equivalents and Investments

The Company’s cash and cash equivalents and investments consist of the following:

	December 31,		December 31,
	2022		2021
Cash	$	5,780	$	6,789
Cash equivalents		1,956		1,403
Short-term investments		22,254		22,562
	$	29,990	$	30,754

Summary of Cash and Cash Equivalents in Foreign Bank Accounts

The Company's cash and cash equivalents in foreign bank accounts consist of the following:

	December 31,		December 31,
	2022		2021
China	$	2,672	$	2,800
Sweden		1,868		1,004
France		0		105
	$	4,540	$	3,909

Cash Equivalents and Investments Measured at Fair Value

Cash equivalents and Level 1 and Level 2 investments measured at fair value were as follows:

	December 31, 2022								December 31, 2021
	Level 1		Level 2			Total			Level 1		Level 2			Total
Cash equivalents:
Certificates of deposit	$	0	$	0		$	0		$	-	$	0		$	0
Money market funds		1,956		0			1,956			1,403		0			1,403
Total Cash Equivalents	$	1,956	$	0		$	1,956		$	1,403	$	0		$	1,403
Short-Term Investments:
Corporate bonds	$	0	$	21,145		$	21,145		$	0	$	19,659		$	19,659
Certificates of deposit		1,109		0			1,109			2,903		0			2,903
Total Short-Term Investments	$	1,109	$	21,145		$	22,254		$	2,903	$	19,659		$	22,562
Cash equivalents and Investments - book value	$	3,065	$	21,145		$	24,210		$	4,306	$	19,659		$	23,965
Unrealized (losses) gains	$	0	$	(59	)	$	(59	)	$	1	$	(2	)	$	(1	)
Cash equivalents and Investments - fair value	$	3,065	$	21,086		$	24,151		$	4,307	$	19,657		$	23,964

Summary of Allowances for Accounts Receivable

The allowances for accounts receivable consisted of the following:

	December 31, 2022		December 31, 2021
Credit loss provision	$	92	$	26
Credit allowances		40		38
Total allowances	$	132	$	64

Summary of Allowance for Credit Losses

The following table summarizes the allowance for credit losses for the years ended December 31, 2022 and December 31, 2021:

	December 31, 2022		December 31, 2021
Beginning Balance	$	26	$	66
Current period reserve (benefit) for credit losses		66		(40	)
Ending Balance	$	92	$	26

Summary of Inventories

Inventories consisted of the following:

	December 31, 2022		December 31, 2021
Raw materials	$	9,064	$	6,171
Work in process		1,076		690
Finished goods		8,778		6,830
Inventories, net	$	18,918	$	13,691

Summary of Property and Equipment

Property and equipment consisted of the following:

	December 31, 2022			December 31, 2021
Building	$	6,922		$	6,892
Computers and office equipment		10,217			10,604
Manufacturing and test equipment		14,661			16,305
Furniture and fixtures		1,475			1,455
Leasehold improvements		1,965			3,021
Motor vehicles		20			20
Total property and equipment		35,260			38,297
Less: Accumulated depreciation and amortization		(27,026	)		(28,118	)
Land		1,770			1,770
Property and equipment, net	$	10,004		$	11,949

Summary of Accrued Liabilities

Accrued liabilities consisted of the following:

	December 31, 2022		December 31, 2021
Payroll and other employee benefits	$	4,318	$	2,266
Inventory receipts		3,720		4,302
Paid time off		1,001		1,284
Income and sales taxes		836		415
Operating leases		527		475
Deferred revenues		495		538
Professional fees and contractors		346		233
Warranties		317		257
Customer refunds for estimated returns		235		248
Employee stock purchase plan		232		253
Real estate taxes		158		156
Finance leases		51		62
Restructuring		0		368
Other		369		260
Total	$	12,605	$	11,117

Summary of Long-term Liabilities

Long-term liabilities consisted of the following:

	December 31, 2022		December 31, 2021
Operating leases	$	3,327	$	3,600
Deferred revenue		181		181
Finance leases		73		92
Other		43		126
Total	$	3,624	$	3,999