Primarily in connection with the Company’s continued integration and realignment efforts following the 2016 acquisition of Kroll Ontrack, LLC, the Company recorded severance and retention expense of $1.2 million and $2.5 million during the years ended December 31, 2021 and 2020, comprised of employee severance and other employee-related costs associated with a reduction in workforce of 27 and 39 employees for 2021 and 2020, respectively. Severance and retention expense are included in the Consolidated Statements of Comprehensive Loss as follows (in thousands):

	Year Ended December 31, 2021		Year Ended December 31, 2020
Costs of revenues	$	57	$	950
General and administrative		469		469
Sales and marketing		679		1,076
Research and development		—		8
Total	$	1,205	$	2,503

The activity and balance of severance-related liabilities, which are recorded within Accounts payable and accrued expense in our Consolidated Balance Sheet are as follows (in thousands):

Balance at December 31, 2019	$	358
Payments		(1,395	)
Expense		2,503
Balance at December 31, 2020	$	1,466
Payments		(2,228	)
Expense		1,205
Balance at December 31, 2021	$	443