Summary of Significant Accounting Policies - Schedule of Changes to Obsolete and Excess Inventories Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Obsolete Inventory Reserve
Balance at beginning of year	$ 5,440	$ 4,131	$ 3,881
Net additions charged to earnings	2,964	2,663	2,195
Disposals	(2,004)	(1,354)	(1,945)
Balance at end of year	$ 6,400	$ 5,440	$ 4,131