Stock based compensation (Tables)

6 Months Ended

Jun. 30, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock-based Compensation Expenses

The Company’s stock-based compensation expense by award type is summarized as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
One-time IPO unit awards	$	—	$	304	$	—	$	1,029
Unit awards		849		520		1,568		1,084
Option awards		539		335		1,020		628
Stock based compensation expense, net of tax	$	1,388	$	1,159	$	2,588	$	2,741

Schedule of Unrecognized Stock-based Compensation Expense

	Units			Options			Total
Balance as of December 31, 2020	$	1,545		$	1,432		$	2,977
Grants		2,564			2,130			4,694
Forfeitures		(81	)		—			(81	)
Expense		(719	)		(481	)		(1,200	)
Balance as of March 31, 2021		3,309			3,081			6,390
Grants		892			—			892
Forfeitures		(113	)		(69	)		(182	)
Expense		(849	)		(539	)		(1,388	)
Balance as of June 30, 2021	$	3,239		$	2,473		$	5,712