Summary of Significant Accounting Policies and Other Items (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Rollforward of the allowance for credit losses

The following is a rollforward of our allowance for credit losses:

	Balance at Beginning of Period		Expense		Write off		Translation Adjustments		Balance at End of Period
Year Ended December 31, 2022	$	741	$	406	$	(86)	$	(1)	$	1,060
Year Ended December 31, 2021	598		310		(167)		—		741
Year Ended December 31, 2020	837		342		(581)		—		598

Rollforward of inventory obsolescence reserve

The following is a rollforward of our inventory obsolescence reserve:

	Balance at Beginning of Period		Expense		Write off		Translation Adjustments		Balance at End of Period
Year Ended December 31, 2022	$	18,012	$	2,739	$	(202)	$	(61)	$	20,488
Year Ended December 31, 2021	14,637		3,490		(62)		(53)		18,012
Year Ended December 31, 2020	9,772		4,840		(53)		78		14,637

Schedule of PP&E useful lives

Estimated useful lives are as follows:

Land	N/A
Buildings and improvements	5	-	30	years
Machinery and equipment	2	-	12	years
Vehicles under finance lease			3	years
Rental equipment	2	-	11	years
Furniture and fixtures			5	years
Computers and software	2	-	4	years

Property and equipment as of December 31, 2022 and 2021 consists of the following:

	December 31,
	2022		2021
Land	$	5,302	$	3,203
Buildings and improvements	25,480		22,532
Machinery and equipment	57,883		56,937
Vehicles under finance lease	29,045		23,450
Rental equipment	194,088		180,704
Furniture and fixtures	1,759		1,755
Computers and software	3,068		3,495
Gross property and equipment	316,625		292,076
Less: Accumulated depreciation	(200,573)		(175,992)
Net property and equipment	116,052		116,084
Construction in progress	13,946		13,033
Total property and equipment, net	$	129,998	$	129,117

Schedule of depreciation expense by income statement caption

Depreciation and amortization expense is included in the consolidated statements of income as follows:

	Year Ended December 31,
	2022		2021		2020
Cost of product revenue	$	3,022	$	3,176	$	3,506
Cost of rental revenue	23,663		25,812		28,063
Cost of field service and other revenue	6,986		6,863		8,075
Selling, general and administrative expenses	453		457		876
Total depreciation and amortization	$	34,124	$	36,308	$	40,520

Schedule of accrued expenses and other current liabilities

Accrued expenses and other current liabilities as of December 31, 2022 and 2021 are as follows:

	December 31,
	2022		2021
Payroll, incentive compensation, payroll taxes and benefits	$	9,484	$	7,030
Accrued professional fees and other	7,347		1,078
Accrued international freight and tariffs	5,887		14,794
Taxes other than income	2,728		1,641
Income based tax payable	2,537		1,182
Deferred revenue	1,450		1,764
Accrued workers’ compensation insurance	576		269
Accrued dividends	484		346
Product warranties	126		136
Total accrued expenses and other current liabilities	$	30,619	$	28,240