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Leases (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Components of Lease Expense and Cash Flow Information The following table summarizes the lease expense by category in the Consolidated Statement of Operations:
(in thousands)For the Year Ended December 31,
20222021
Cost of sales$6,300 $6,079 
Research, development and engineering expenses267 326 
Selling, general and administrative expenses169 174 
Interest expense21 44 
Total$6,757 $6,623 
The following table summarizes the components of lease expense:
(in thousands)For the Year Ended December 31,
20222021
Operating lease cost
$4,706 $4,855 
Finance lease cost:
Amortization of ROU asset148 192 
Interest expense21 33 
Short-term lease cost
100 267 
Variable lease cost
1,782 1,276 
Sublease income(1,062)— 
Total lease cost$5,695 $6,623 
The following table presents supplemental cash flow information related to leases:
(in thousands)For the Year Ended December 31,
20222021
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows paid for operating leases$4,859 $4,959 
Operating cash flows paid for interest portion of finance leases21 33 
Financing cash flows paid for principal portion of finance leases157 194 
Right-of-use assets obtained in exchange for lease obligations
Operating leases
3,540 137 
Finance leases— — 
Supplemental Balance Sheet Information
The following table presents supplemental balance sheet information related to leases:
(in thousands)As of December 31,
20222021
Operating lease ROU assets, net 1
$13,282 $13,545 
Operating lease liabilities, current
2,894 3,978 
Operating lease liabilities, non-current 10,971 10,304 
Total operating lease liabilities
$13,865 $14,282 
Finance lease ROU assets, net 1
$225 $364 
Finance lease liabilities, current
90 147 
Finance lease liabilities, non-current 170 260 
Total finance lease liabilities
$260 $407 

1.    Included in Other noncurrent assets for operating leases and Property, plant and equipment, net for finance leases on the Consolidated Balance Sheets.
Maturity Analysis of Operating Lease Liabilities
The following table presents maturity analysis of lease liabilities as of December 31, 2022:
(in thousands)
Year Ending December 31,Operating LeasesFinance Leases
2023$3,767 $103 
20242,668 85 
20252,731 82 
20262,421 17 
20272,413 — 
Thereafter3,015 — 
Total undiscounted lease payments
17,015 286 
Less: imputed interest
3,150 26 
Total lease liabilities
$13,865 $260 
Maturity Analysis of Financing Lease Liabilities
The following table presents maturity analysis of lease liabilities as of December 31, 2022:
(in thousands)
Year Ending December 31,Operating LeasesFinance Leases
2023$3,767 $103 
20242,668 85 
20252,731 82 
20262,421 17 
20272,413 — 
Thereafter3,015 — 
Total undiscounted lease payments
17,015 286 
Less: imputed interest
3,150 26 
Total lease liabilities
$13,865 $260