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Long-Term Debt - Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Long-Term Debt    
Principal amount of long-term debt $ 15,000 $ 15,000
Less: Current portion of long-term debt   (500)
Long-term debt, net of current portion 15,000 14,500
Debt discount, net of accretion   (168)
Long-term debt, net of discount and current portion $ 15,000 $ 14,332