12.5% Senior Secured Notes and Loans Payable, 12.5% Senior Secured Notes (Details) $ / shares in Units, $ in Thousands				3 Months Ended			12 Months Ended
	Oct. 07, 2021 USD ($) payment	Nov. 03, 2020 USD ($) shares	Jul. 15, 2019 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2025	Sep. 30, 2022	Dec. 31, 2020 USD ($)
12.5% Senior Secured Notes [Abstract]
Warrants issued (in shares) | shares			2,000,000
Warrant exercise price (in dollars per share) | $ / shares			$ 0.001
Net proceeds from issuance of initial notes, warrants and first offer rights			$ 66,082
Long-term debt				$ 51,500
Premium on early retirement of debt		$ 2,250		2,250
Interest and other expense, net					$ 13,822
Amortization expense, deferred debt issuance costs and debt discounts				$ 40		$ 1,184
Forecast
12.5% Senior Secured Notes [Abstract]
Principal payments, percentage of face amount							40.00%	10.00%
Senior Notes
12.5% Senior Secured Notes [Abstract]
Proceeds from refinancing of debt		4,000
Payments of loan costs		$ 220
Maximum | Marathon Pangolin Royalty LLC
12.5% Senior Secured Notes [Abstract]
Percentage of cash proceeds				30.00%
Senior Secured Notes Due 2025
12.5% Senior Secured Notes [Abstract]
Interest rate				12.50%
Principal amount			$ 70,000
Warrants issued (in shares) | shares		714,000
Warrants issued to purchase common stock (in shares) | shares		143,000
Additional borrowing capacity				$ 30,000
Redemption percentage of debt under change of control provisions				101.00%
Amortization expense, deferred debt issuance costs and debt discounts				$ 4		$ 1,152
Unamortized deferred debt issuance cost and deferred debt discounts				39	$ 43
Senior Secured Notes Due 2025 | Put Option
12.5% Senior Secured Notes [Abstract]
Fair value of put option				133
Senior Secured Notes Due 2025 | Put Option | Accrued Expenses
12.5% Senior Secured Notes [Abstract]
Fair value of put option				33
Senior Secured Notes Due 2025 | Put Option | Other Noncurrent Liabilities
12.5% Senior Secured Notes [Abstract]
Fair value of put option				$ 100
Senior Secured Notes Due 2025 | Senior Notes
12.5% Senior Secured Notes [Abstract]
Interest rate			12.50%	12.50%
Repayment of debt		$ 22,500
Long-term debt		$ 70,000		$ 51,500					$ 51,500
Repurchase price percentage				112.50%
Prepayment premiums paid	$ 2,700
Number of quarterly payments | payment	4
Senior Secured Notes Due 2025 | Minimum
12.5% Senior Secured Notes [Abstract]
Elective redemption percentage of debt				101.56%
Senior Secured Notes Due 2025 | Maximum
12.5% Senior Secured Notes [Abstract]
Principal amount			$ 100,000
Elective redemption percentage of debt				112.50%
Senior Secured Notes Due 2025 - First Additional Offering
12.5% Senior Secured Notes [Abstract]
Warrant exercise price (in dollars per share) | $ / shares				$ 0.001
Additional borrowing capacity				$ 10,000
Senior Secured Notes Due 2025 - First Additional Offering | Maximum
12.5% Senior Secured Notes [Abstract]
Warrants issued (in shares) | shares				2,143,000
Senior Secured Notes Due 2025 - Second Additional Offering
12.5% Senior Secured Notes [Abstract]
Additional borrowing capacity				$ 20,000