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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Summary of Average Estimated Useful Lives of Assets Provisions for depreciation are calculated using the straight-line method over the following average estimated useful lives of the assets:

 

 

Years

 

Laboratory equipment

 

5

 

Software and computer equipment

 

3

 

Machinery and equipment

 

2-20

 

Furniture and fixtures

 

7

 

Vehicles

 

5

 

Leasehold improvements

 

2-10

*

 

*

Leasehold improvements are depreciated over the shorter of the estimated life of the asset or the remaining life of the lease.
Amounts Recognized in Consolidated Statements of Operations and Comprehensive Loss Net Amounts recognized in the consolidated statements of operations and comprehensive loss were as follows (in thousands):

 

 

Year Ended December 31,

 

 

 

2020

 

 

2019

 

 

 

(in thousands)

 

Research and development

 

$

341

 

 

$

321

 

Selling, general and administrative

 

 

1,701

 

 

 

1,966

 

Total stock-based compensation

 

$

2,042

 

 

$

2,287