Quarterly report pursuant to Section 13 or 15(d)

Other Current Liabilities

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Other Current Liabilities
 9 Months Ended
Sep. 30, 2021
Other Liabilities Disclosure [Abstract]  
Other Current Liabilities
12. Other Current Liabilities
The components of other current liabilities were as follows:
September 30, December 31,
2021 2020
(in thousands)
Warrant liability $ —  $ 558 
Other current liabilities 163  28 
Current portion of capital lease 49  48 
Contingent liability 1,432  — 
Working capital liability 1,057  6,805 
Total other current liabilities $ 2,701  $ 7,439 
The contingent liability represents a liability for estimated indirect taxes, previously classified as long-term. Refer to Note 21 for more information.
The working capital liability as of December 31, 2020 was reduced by payments of $2.8 million and a contractual refund of $3.9 million for a terminated launch services agreement for which a right of setoff exists and increased by a working capital adjustment related to a potential shortfall in accounts receivable in the closing balance sheet of $1.0 million. Refer to Note 8 for more information.