Summary of Significant Accounting Policies - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Loss on disposal of assets	$ 1,800,000	$ 2,250,000	$ 286,000	$ 842,000
Capitalized inventories	$ 0	$ 0	0
Revision of Prior Period, Reclassification, Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Provision for bad debt			100,000	300,000
Loss on disposal of assets			$ 300,000	$ 800,000