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Leases (Tables)
 9 Months Ended
Sep. 30, 2021
Leases [Abstract]  
Components of Lease Cost and Supplemental Cash Flow Information Components of the operating and restructured lease costs recognized in net loss for the three and nine months ended September 30, 2021 and 2020, were as follows (in thousands):
Three months ended September 30,Nine months ended September 30,
 2021202020212020
Operating lease cost (income)
Sub-lease income$(25)$(26)$(87)$(80)
Lease cost139 148 423 451 
Operating lease cost, net114 122 336 371 
Restructured lease cost (income)
Sub-lease income— (68)(136)(204)
Lease cost— 59 109 180 
Restructured lease income, net— (9)(27)(24)
Total lease cost, net$114 $113 $309 $347 
Schedule of Supplemental Balance Sheet Information Supplemental balance sheet information related to the Company’s operating and finance leases as of September 30, 2021 and December 31, 2020 are as follows (in thousands):
 September 30, 2021December 31, 2020
Operating Leases
Operating lease right-of-use assets$419 $794 
Restructured lease right-of-use assets— 107 
Operating lease right-of-use assets, total419 901 
Operating lease liabilities505 916 
Restructured lease liabilities— 168 
Operating lease liabilities, total505 1,084 
Finance Leases
Property and equipment13 13 
Allowances for depreciation(11)(9)
Finance lease assets, net2 4 
Finance lease liabilities1 4 
Total finance lease liabilities$1 $4 
Schedule of Future Maturities of Finance Lease Liabilities Future minimum lease payments required under operating and finance leases for each of the 12-month rolling periods below in effect at September 30, 2021 are as follows (in thousands):
Operating LeasesFinance Lease
October 2021 to September 2022$488 $1 
October 2022 to September 202319 — 
October 2023 to September 20248 — 
October 2024 to September 20253 — 
October 2025 to September 20262 — 
Total future undiscounted lease payments520 1 
Less imputed interest(15)— 
Total lease obligations$505 $1 
Schedule of Future Maturities of Operating Lease Liabilities Future minimum lease payments required under operating and finance leases for each of the 12-month rolling periods below in effect at September 30, 2021 are as follows (in thousands):
Operating LeasesFinance Lease
October 2021 to September 2022$488 $1 
October 2022 to September 202319 — 
October 2023 to September 20248 — 
October 2024 to September 20253 — 
October 2025 to September 20262 — 
Total future undiscounted lease payments520 1 
Less imputed interest(15)— 
Total lease obligations$505 $1 
Supplemental Cash Flow Information Related to Leases Supplemental cash flow information related to leases for the three and nine months ended September 30, 2021 and 2020, was as follows (in thousands):
Three months ended September 30,Nine months ended September 30,
 2021202020212020
Supplemental cash flow information 
Cash paid, net, for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$161 $134 $421 $401 
Operating cash flows from restructured leases$— $17 $35 $52 
Financing cash flows from finance leases$1 $1 $3 $3