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Other Assets
 12 Months Ended
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Other Assets OTHER ASSETS
Prepaid expenses and other current assets consist of the following at December 31:
 
2019
 
2018
Commodity derivatives and related collateral, net
$
6,140

 
$
13,799

Prepaid expenses
16,082

 
19,328

Deposits
3,519

 
2,123

RIN inventory
2,137

 
2,000

Taxes receivable
5,115

 
2,991

Other
2,480

 
928

Total
$
35,473

 
$
41,169


RIN inventory is valued at the lower of cost or net realizable value and consists of (i) RINs the Company generates in connection with its production of biomass-based diesel and (ii) RINs acquired from third parties. RINs generated by the Company are recorded at no cost, as these RINs are government incentives and not a tangible output from its biomass-based diesel production. The cost of RINs acquired from third parties is determined using the average cost method. RIN market value is based upon pricing as reported by the OPIS. Since RINs generated by the Company have zero cost associated to them, the lower of cost or market adjustment in RIN inventory reflects only the value of RINs obtained from third parties. RIN inventory values were adjusted in the amount of $0 and $630 at December 31, 2019 and 2018, respectively, to reflect the lower of cost or market.
Other noncurrent assets consist of the following at December 31:
 
2019
 
2018
Investments
$
19,205

 
$
13,053

Spare parts inventory
2,610

 
2,680

Catalysts
1,274

 
1,989

Deposits
552

 
381

Other
2,874

 
3,167

Total
$
26,515

 
$
21,270