Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Commitments and Contingencies

Schedule of operating cash flow supplemental information

	Years ended December 31,
(in thousands)	2019		2020
Cash paid for amounts included in the measurement of the operating lease liabilities	$	515	$	507
Right-of-use assets obtained in exchange for operating lease obligations	$	1,647	$	226

Schedule of future payments of operating lease liabilities, ASC 842

(in thousands)	December 31, 2020
2021	$	171
2022		—
2023		—
Total lease payments		171
Less imputed interest and amortization differences		(3)
Present value of operating lease liabilities		168

Schedule of future minimum contractual obligations and commitments

	Year ending December 31,
(in thousands)	Total		2021		2022		2023		2024		2025		Thereafter
Operating lease obligations	$	743	$	743	$	—	$	—	$	—	$	—	$	—
Other contractual commitments		58,166		14,059		12,569		12,838		9,350		9,350		—
Total	$	58,909	$	14,802	$	12,569	$	12,838	$	9,350	$	9,350	$	—