Other Assets - Loan to a Hardware Supplier (Details) - USD ($)			1 Months Ended	3 Months Ended			6 Months Ended		9 Months Ended
	Jul. 15, 2019	Jun. 24, 2019	Mar. 30, 2019	Jun. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments to acquire notes receivable							$ 0	$ 20,061,000
Expense (reversal) related to promissory note							(382,000)	(3,319,000)
Interest income				$ 157,000		$ 806,000	616,000	$ 1,614,000
Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Payments to acquire notes receivable			$ 16,400,000
Accrued contingent liability					$ 6,000,000.0				$ 6,000,000.0
Fair value of acquired note			$ 22,400,000
Hardware Supplier
Accounts, Notes, Loans and Financing Receivable [Line Items]
Receipt of payment on notes receivable	$ 25,000,000.0	$ 7,400,000
Conversion of outstanding notes receivable	$ 5,600,000			$ 5,600,000			$ 5,600,000			$ 5,600,000
Conversion of outstanding notes receivable (in shares)	9,520,832
Interest income					1,700,000				1,700,000
Gain recorded within other income, net					6,900,000				6,900,000
Hardware Supplier | Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, maximum available											$ 7,400,000
Expense (reversal) related to promissory note						$ (3,300,000)
Hardware Supplier | Other Current Assets | Notes Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan receivable, current					$ 0				$ 0
Hardware Supplier | Other Third-Party Secured Creditor
Accounts, Notes, Loans and Financing Receivable [Line Items]
Outstanding balance												$ 26,600,000