Debt (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of long-term debt

Debt obligations as of December 31, 2020 and 2021 consisted of the following (in thousands):

	December 31, 2020
			Unamortized Debt		Balance, Net of
	Principal Balance		Financing Costs		Financing Costs
bp Loan	$	50,000	$	—	$	50,000
NG Advantage debt		29,535		117		29,418
SG Facility		5,100		—		5,100
Other debt		1,162		—		1,162
Total debt		85,797		117		85,680
Less amounts due within one year		(3,631)		(39)		(3,592)
Total long-term debt	$	82,166	$	78	$	82,088

	December 31, 2021
			Unamortized Debt		Balance, Net of
	Principal Balance		Financing Costs		Financing Costs
NG Advantage debt	$	25,832		72		25,760
SG Facility		9,500		—		9,500
Other debt		800		—		800
Total debt		36,132		72		36,060
Less amounts due within one year		(12,868)		(23)		(12,845)
Total long-term debt	$	23,264	$	49	$	23,215

Summary of aggregate maturities of long term debt and capital lease obligations

The following is a summary of the aggregate maturities of debt obligations for each of the annual periods subsequent to December 31, 2021 (in thousands):

	2022		2023		2024		2025		2026		Thereafter		Total
NG Advantage debt	$	2,991	$	8,977	$	4,161	$	1,397	$	8,306	$	—	$	25,832
SG Facility		9,500		—		—		—		—		—		9,500
Other Debt		377		262		161		—		—		—		800
Total	$	12,868	$	9,239	$	4,322	$	1,397	$	8,306	$	—	$	36,132