XML 37 R12.htm IDEA: XBRL DOCUMENT v3.20.4
Balance Sheet Components
12 Months Ended
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Balance Sheet Components Balance Sheet Components
Inventory and Other Assets
Inventory consisted of the following (in thousands):
December 31,
20202019
Raw materials$2,469 $1,574 
Finished goods2,844 2,463 
Total$5,313 $4,037 


The Company uses Printed Circuit Board Assemblies (“PCBAs”), in each wearable Zio XT and Zio AT monitor as well as the wireless gateway used in conjunction with the Zio AT monitor. The PCBAs are used numerous times and have useful lives beyond one year. Each time a PCBA is used in a wearable Zio XT monitor or Zio AT monitor, a portion of the cost of the PCBA is recorded as a cost of revenue. Each time a wireless gateway is used with a Zio AT monitor, a portion of the gateway is recorded as a cost of revenue. PCBAs which are recorded as other assets were $12.6 million and $7.4 million as of December 31, 2020, and December 31, 2019, respectively. The amortization was $3.0 million and $3.6 million for the years ending December 31, 2020 and 2019 respectively.
Property and Equipment, Net
Property and equipment, net consisted of the following (in thousands):
December 31,
20202019
Laboratory and manufacturing equipment$4,667 $4,238 
Computer equipment and software2,005 2,315 
Furniture and fixtures3,794 3,669 
Leasehold improvements9,215 7,597 
Internal-use software28,416 16,277 
Total property and equipment, gross48,097 34,096 
Less: accumulated depreciation and amortization(13,850)(7,632)
Total property and equipment, net$34,247 $26,464 
Depreciation and amortization expense for the years ended December 31, 2020 and 2019 was $6.9 million and $3.4 million, respectively.
Accrued Liabilities
Accrued liabilities consisted of the following (in thousands):
December 31,
20202019
Accrued vacation$6,007 $3,809 
Accrued payroll and related expenses19,709 19,156 
Accrued ESPP Contributions851 417 
Accrued professional services fees1,709 2,846 
Accrued interest121 128 
Claims payable4,757 2,802 
Other7,378 3,556 
Total accrued liabilities$40,532 $32,714