Investments (Tables)

6 Months Ended

Jun. 30, 2023

Investments

Schedule of marketable securities

	June 30, 2023				December 31, 2022
	Amortized		Market		Amortized		Market
	Cost		Value		Cost		Value
	(Dollars in thousands)
Marketable securities:
Current	$	1,097	$	1,094	$	1,385	$	1,381
Due from one through five years		3,263		3,216		3,977		3,950
Due from six through ten years		2,747		2,913		2,347		2,455
Due from eleven through twenty years		400		374		799		773
Total	$	7,507	$	7,597	$	8,508	$	8,559

Schedule of unrealized gains on marketable securities

	June 30, 2023				December 31, 2022
	Unrealized		Unrealized		Unrealized		Unrealized
	Gains		Losses		Gains		Losses
	(Dollars in thousands)
Marketable securities	$	191	$	(101)	$	145	$	(94)