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Financial Statement Details (Tables)
12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Inventories
Inventories consist of the following (in thousands):
December 31,
 20212020
Finished goods$33,112 $27,009 
Raw materials and components4,290 6,943 
$37,402 $33,952 
Summary of Prepaid Expenses and Other
Prepaid expenses and other consists of the following (in thousands):
December 31,
 20212020
Rebate receivables$6,398 $5,992 
Receivables from contract manufacturers2,626 — 
Software licenses1,261 707 
Insurance1,269 1,262 
Deposits1,023 1,544 
Financed assets323 218 
Other724 478 
$13,624 $10,201 
Summary of Property, Plant and Equipment and Rental Assets
Property, plant and equipment consists of the following (in thousands):
 December 31,
 20212020
Land$— $244 
Buildings— 2,213 
Test equipment19,095 16,775 
Computer equipment and purchased software7,618 7,899 
Product tooling4,350 3,125 
Furniture and fixtures1,214 1,310 
Vehicles1,654 2,988 
Leasehold improvements863 860 
34,794 35,414 
Less—accumulated depreciation and amortization(26,692)(21,715)
$8,102 $13,699 
Rental assets consist of the following (in thousands):
 December 31,
 20212020
Rental assets$9,967 $21,863 
Less—accumulated depreciation(5,392)(15,754)
$4,575 $6,109 
Summary of Accrued Expenses and Other Current Liabilities
Accrued expenses and other current liabilities consist of the following (in thousands):
December 31,
 20212020
Royalties$2,243 $2,410 
Payroll and related expenses9,326 6,006 
Warranty obligations473 366 
Professional fees502 921 
Bank overdrafts370 160 
Accrued interest877 888 
Deferred revenue3,832 2,853 
Operating lease liabilities1,769 1,619 
Accrued contract manufacturing liabilities927 938 
Liabilities related to financed assets1,593 2,686 
Value added tax payables642 2,039 
Other3,699 2,487 
$26,253 $23,373