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Debt (Tables)
 3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Debt
Long-term debt consists of the following:
March 31, 2023December 31, 2022
Principal Amount OutstandingDebt Discounts and Debt Issuance CostsCarrying ValuePrincipal Amount OutstandingDebt Discounts and Debt Issuance CostsCarrying Value
Convertible Bond Debt$104,119 $(524)$103,595 $104,119 $(620)$103,499 
Global Ultraco Debt Facility225,300 (6,346)218,954 237,750 (6,767)230,983 
Total debt329,419 (6,870)322,549 341,869 (7,387)334,482 
Less: Current portion - Global Ultraco Debt Facility(49,800)— (49,800)(49,800)— (49,800)
Total long-term debt $279,619 $(6,870)$272,749 $292,069 $(7,387)$284,682 
Schedule of Interest Expense
A summary of interest expense for the three months ended March 31, 2023 and 2022 is as follows:
Three Months Ended
March 31, 2023March 31, 2022
Convertible Bond Debt interest$1,301 $1,427 
Global Ultraco Debt Facility interest (1)
1,793 2,213 
Commitment fees on revolving credit facilities245 245 
Amortization of debt discount and debt issuance costs518 562 
Total interest expense$3,857 $4,447 
(1)
Interest expense on the Global Ultraco Debt Facility includes a reduction of $2.3 million of interest and $0.5 million of interest from interest rate derivatives designated as hedging instruments for the three months ended March 31, 2023 and 2022, respectively. See Note 5, Derivative Instruments for additional information.
Schedule of Weighted Average And Contractual Interest Rates In addition, the following table presents the range of contractual interest rates on the Company’s debt obligations, excluding the impact of costs associated with commitment fees on revolving facilities for the three months ended March 31, 2023 and 2022.
 Three Months Ended
 March 31, 2023March 31, 2022
Weighted average effective interest rate7.31 %4.05 %
Range of interest rates
5.00% to 6.97%
2.35% to 5.00%
Schedule of Debt Maturities
The following table presents the scheduled maturities of principal amounts of our debt obligations as of March 31, 2023:
Global Ultraco Debt Facility
Convertible Bond Debt (1)
Total
Nine months ending December 31, 2023$37,350 $— $37,350 
202449,800 104,119 153,919 
202549,800 — 49,800 
202688,350 — 88,350 
$225,300 $104,119 $329,419 
(1)
This amount represents the aggregate principal amount of the Convertible Bond Debt outstanding that would be repaid, in cash, at the election of the Company, upon maturity.