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Leases (Tables)
 6 Months Ended
Jun. 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 six months ended June 30, 2021 and 2020, were as follows (in thousands):
Three months ended June 30,Six months ended June 30,
 2021202020212020
Operating lease cost (income)
Sub-lease income$(37)$(29)$(62)$(54)
Lease cost141 151 284 303 
Operating lease cost, net104 122 222 249 
Restructured lease cost (income)
Sub-lease income(68)(68)(136)(136)
Lease cost53 60 109 121 
Restructured lease income, net(15)(8)(27)(15)
Total lease cost, net$89 $114 $195 $234 
Schedule of Supplemental Balance Sheet Information Supplemental balance sheet information related to the Company’s operating and finance leases as of June 30, 2021 and December 31, 2020 are as follows (in thousands):
 June 30, 2021December 31, 2020
Operating Leases
Operating lease right-of-use assets$548 $794 
Restructured lease right-of-use assets— 107 
Operating lease right-of-use assets, total548 901 
Operating lease liabilities655 916 
Restructured lease liabilities— 168 
Operating lease liabilities, total655 1,084 
Finance Leases
Property and equipment13 13 
Allowances for depreciation(11)(9)
Finance lease assets, net2 4 
Finance lease liabilities2 4 
Total finance lease liabilities$2 $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 June 30, 2021 are as follows (in thousands):
Operating LeasesFinance Lease
July 2021 to June 2022$644 $2 
July 2022 to June 202319 — 
July 2023 to June 202412 — 
July 2024 to June 20253 — 
July 2025 to June 20262 — 
Total future undiscounted lease payments680 2 
Less imputed interest(25)— 
Total lease obligations$655 $2 
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 June 30, 2021 are as follows (in thousands):
Operating LeasesFinance Lease
July 2021 to June 2022$644 $2 
July 2022 to June 202319 — 
July 2023 to June 202412 — 
July 2024 to June 20253 — 
July 2025 to June 20262 — 
Total future undiscounted lease payments680 2 
Less imputed interest(25)— 
Total lease obligations$655 $2 
Supplemental Cash Flow Information Related to Leases Supplemental cash flow information related to leases for the three and six months ended June 30, 2021 and 2020, was as follows (in thousands):
Three months ended June 30,Six months ended June 30,
 2021202020212020
Supplemental cash flow information 
Cash paid, net, for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$124 $132 $260 $267 
Operating cash flows from restructured leases$18 $18 $35 $35 
Financing cash flows from finance leases$1 $1 $2 $2