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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Reconciliation of cash and cash equivalents and restricted cash See the
table below for reconciliation of Cash and cash equivalents and restricted cash in regard to the Consolidated Statements of Cash Flows:
December 31, 2021December 31, 2020December 31, 2019
Cash and cash equivalents$497,653 $84,441 $50,436 
Restricted cash4,218 3,777 3,000 
Total cash, cash equivalents and restricted cash shown in the statement of cash flows$501,871 $88,218 $53,436 
Accounts receivable
December 31, 2021December 31, 2020
Trade accounts receivable from customers (net of allowance for doubtful accounts of $1,814 and $1,631, respectively)
$106,628 $74,774 
BTC receivables from the government49,626 68,125 
Other trade receivables1,933 576 
Total$158,187 $143,475 
Estimated useful lives Depreciation expense is computed on a straight-line method based upon estimated useful lives of the assets. Estimated useful lives are as follows: 
Automobiles and trucks5 years
Computers and office equipment5 years
Office furniture and fixtures7 years
Machinery and equipment
5-30 years
Leasehold improvementslease term
Buildings and improvements
30-40 years
Activity under repurchase agreements The table below sets out the information regarding the activities under the 2019 Program and 2020 Program during 2020:
For the year ended December 31, 2020
Number of shares/Principal amount in $'000January 2019 ProgramFebruary 2020 ProgramBoth Programs
2036 Convertible Senior Notes Repurchases$30,008 $67,804 $8,086 $75,890 
Disaggregation of revenue The following table depicts the disaggregation of revenue according to product line and segment:
Reportable Segments
Year ended December 31, 2021Bio-based
Diesel
ServicesCorporate
and other
Intersegment
Revenues
Consolidated
Total
Bio-based diesel sales$2,143,832 $— $— $(4,897)$2,138,935 
Petroleum diesel sales— — 158,587 — 158,587 
LCFS credit sales158,926 — — — 158,926 
Separated RIN sales355,541 — — — 355,541 
Co-product sales81,510 — — — 81,510 
Raw material sales20,974 — — — 20,974 
Other bio-based diesel revenue38,799 — — — 38,799 
Other revenues— 203,690 — (203,690)— 
Total revenues from contracts with customers$2,799,582 $203,690 $158,587 $(208,587)$2,953,272 
Bio-based diesel government incentives290,778 — — — 290,778 
Total revenues$3,090,360 $203,690 $158,587 $(208,587)$3,244,050 
Reportable Segments
Year ended December 31, 2020Bio-based
Diesel
ServicesCorporate
and other
Intersegment
Revenues
Consolidated
Total
Bio-based diesel sales, net of BTC related amount due to customers of $1,082
$1,342,944 $— $— $(9,099)$1,333,845 
Petroleum diesel sales— — 116,318 — 116,318 
LCFS credit sales131,329 — — — 131,329 
Separated RIN sales129,715 — — — 129,715 
Co-product sales48,046 — — — 48,046 
Raw material sales30,199 — — — 30,199 
Other bio-based diesel revenue40,987 — — — 40,987 
Other revenues— 87,282 — (85,875)1,407 
Total revenues from contracts with customers$1,723,220 $87,282 $116,318 $(94,974)$1,831,846 
Bio-based diesel government incentives305,302 — — — 305,302 
Total revenues$2,028,522 $87,282 $116,318 $(94,974)$2,137,148 
Reportable Segment
Year ended December 31, 2019Bio-based DieselServicesCorporate and otherIntersegment RevenuesConsolidated Total
Bio-based diesel sales, net of BTC related amount due to customers of $157,896
$1,399,509 $— $— $(11,309)$1,388,200 
Petroleum diesel sales— — 270,326 — 270,326 
LCFS credit sales106,524 — — — 106,524 
Separated RIN sales98,285 — — — 98,285 
Co-product sales38,777 — — — 38,777 
Raw material sales26,456 — — — 26,456 
Other bio-based diesel revenue44,793 — — — 44,793 
Other revenues— 99,086 — (97,446)1,640 
Total revenues from contracts with customers$1,714,344 $99,086 $270,326 $(108,755)$1,975,001 
Bio-based diesel government incentives650,215 — — — 650,215 
Total revenues$2,364,559 $99,086 $270,326 $(108,755)$2,625,216 
Contract balances The following table provides information about receivables and contract liabilities from contracts with customers:
December 31, 2021December 31, 2020
Trade accounts receivable, gross$108,443 $74,774 
Short-term contract liabilities (deferred revenue)$(1,822)$(946)
Short-term contract liabilities (accounts payable)$(699)$(914)
Significant changes to the contract liabilities during 2021 and 2020 are as follows:
January 1, 2021Cash receipts
(Payments)
Less: Impact on
Revenue
OtherDecember 31, 2021
Deferred revenue$946 $41,797 $40,921 $— $1,822 
Payables to customers related to BTC914 (215)— — 699 
$1,860 $41,582 $40,921 $— $2,521 
January 1, 2020Cash receipts
(Payments)
Less: Impact on
Revenue
OtherDecember 31, 2020
Deferred revenue$631 $20,357 $20,042 $— $946 
Payables to customers related to BTC255,193 (257,235)(1,082)1,874 914 
$255,824 $(236,878)$18,960 $1,874 $1,860