Amounts included in restricted cash represent those required to be set aside as outlined in
Note 1.
Accounts Receivable
Accounts receivable consisted of the following at December 31, 2020 and 2019:
(in thousands) 2020 2019
Accounts receivable - billed S 4,365 S 3,091
Less allowance for doubtful accounts (68) (50)
Accounts receivable - billed, net S 4,297 § 3,041
Accounts receivable - unbilled S 4,473 S 2,575
Less allowance for doubtful accounts - -
Accounts receivable - unbilled, net S 4,473 $ 2,575
Deferred Charges and Other Assets
Deferred charges and other assets as of December 31, 2020 and 2019 consisted of the
following:
Recovery
Period
(in thousands) 2020 2019 (in years)
Regulatory assets:
Source development charges S 1,004 $ 801 5-25
Miscellaneous studies 998 790 2-25
Unrecovered pension and post-retirement
benefits expense 14,197 11,347 0)
Total regulatory assets 16,199 12,938
Supplemental executive retirement plan asset 815 789
Total deferred charges and other assets S 17,014 § 13,727
"! We expect to recover these amounts consistent with the anticipated expense recognition of these assets.
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