Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Schedule of changes in the allowance for doubtful accounts

Changes in the allowance for doubtful accounts for continuing operations are as follows (in thousands):

	Years ended December 31,
	2019			2018			2017
Balance, beginning of year	$	1,190		$	673		$	579
Charged to provision for doubtful accounts, net of recoveries	512			839			157
Write-offs	(175		)	(322		)	(63		)
Balance, end of year	$	1,527		$	1,190		$	673

Schedule of depreciation or amortization of property and equipment

Depreciation or amortization of property and equipment, including assets held under capital leases, is calculated using the straight-line method over the asset’s estimated useful life as follows:

Buildings and leasehold improvements	2-30 years
Machinery and equipment	7-10 years
Furniture and fixtures	3 years
Transportation equipment	2-5 years
Computer equipment and software	3-7 years