Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Activity in Allowance for Doubtful Accounts

Activity in the allowance for doubtful accounts is as follows (in thousands):

Allowance for doubtful accounts	Balance at beginning of period		Additions/ charges		Deductions (1)		Balance at end of period
Year ended December 31, 2021
Allowance for doubtful accounts	$	973		962		502	$	1,433
Year ended December 31, 2020
Allowance for doubtful accounts	$	962		918		907	$	973
Year ended December 31, 2019
Allowance for doubtful accounts	$	945		343		326	$	962

⁽¹⁾ Write-offs, net of recoveries

Estimated Useful Lives of Property and Equipment

The estimated useful lives of the property and equipment are as follows:

Computer equipment	3-5 years
Furniture and equipment	5-7 years
Transportation equipment	5 years
Computer software	3-10 years
Leasehold improvements	Lesser of useful life or lease term