Financial Statement Details

12 Months Ended

Dec. 31, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Inventories

Inventories consist of the following (in thousands):


	December 31,
	2022		2021
Finished goods	$	31,153	$	33,112
Raw materials and components	6,823		4,290
Total inventories	$	37,976	$	37,402

Prepaid expenses and other

Prepaid expenses and other consists of the following (in thousands):


	December 31,
	2022		2021
Rebate receivables	$	2,038	$	6,398
Receivables from contract manufacturers	3,561		2,626
Software licenses	772		1,261
Insurance	12		1,269
Deposits	829		1,023
Financed assets	—		323
Other	766		724
Total prepaid expenses and other	$	7,978	$	13,624

Property, plant and equipment

Property, plant and equipment consists of the following (in thousands):


	December 31,
	2022		2021


Test equipment	$	19,724	$	19,095
Computer equipment and purchased software	4,603		7,618
Product tooling	5,007		4,350
Furniture and fixtures	1,214		1,214
Vehicles	119		1,654
Leasehold improvements	772		863
Total property, plant and equipment, gross	31,439		34,794
Less—accumulated depreciation and amortization	(26,049)		(26,692)
Total property, plant and equipment, net	$	5,390	$	8,102

At December 31, 2022, the Company had property, plant and equipment under finance leases with an aggregate carrying value of $3.1 million, net of accumulated amortization of $2.1 million. At December 31, 2021, the Company had property, plant and equipment under finance leases with an aggregate carrying value of $3.1 million, net of accumulated amortization of $1.3 million.

Rental assets

Rental assets consist of the following (in thousands):


	December 31,
	2022		2021
Rental assets	$	10,300	$	9,967
Less—accumulated depreciation	(5,484)		(5,392)
Total rental assets	$	4,816	$	4,575

Depreciation and amortization

Depreciation and amortization expense related to property, plant and equipment, including rental assets and property, plant and equipment under finance leases, was $7.1 million, $9.8 million and $10.0 million for the years ended December 31, 2022, 2021 and 2020, respectively.

Accrued expenses and other current liabilities

Accrued expenses and other current liabilities consist of the following (in thousands):


	December 31,
	2022		2021
Royalties	$	992	$	2,243
Payroll and related expenses	8,873		9,326
Warranty obligations	480		473

Professional fees	738		502
Bank overdrafts	—		370
Accrued interest	1,112		877
Deferred revenue	5,060		3,832
Customer advances	2,828		—
Operating lease liabilities	1,759		1,769
Accrued contract manufacturing liabilities	1,416		927
Liabilities related to financed assets	—		1,593
Value added tax payables	449		642
Other	4,238		3,699
Total accrued expenses and other current liabilities	$	27,945	$	26,253