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Debt - Interest Expense (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revolving Credit Facility
Debt Instrument [Line Items]
Contractual interest expense	$ 118,000
Amortization of debt issuance costs	117,000
Total interest expense	235,000
2025 Notes | Convertible Debt
Debt Instrument [Line Items]
Contractual interest expense	1,315,000	$ 1,315,000
Amortization of debt discount	207,000	207,000
Amortization of debt issuance costs	165,000	165,000
Total interest expense	$ 1,687,000	$ 1,687,000

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Amount of amortization expense attributable to debt issuance costs.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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