Marketable Securities (Details) - USD ($)
|
Dec. 31, 2023 |
Dec. 31, 2022 |
| Fair Value [Member] |
|
|
| OtherInvestmentsReadilyMarketableLineItems [Line Items] |
|
|
| Certificates of deposit |
$ 6,077,000
|
$ 2,976,000
|
| Government securities |
14,818,000
|
20,848,000
|
| Fixed income mutual funds |
7,676,000
|
10,989,000
|
| Corporate bonds and notes |
|
178,000
|
| Total marketable securities |
28,571,000
|
34,991,000
|
| Cost Basis [Member] |
|
|
| OtherInvestmentsReadilyMarketableLineItems [Line Items] |
|
|
| Certificates of deposit |
6,112,000
|
3,019,500
|
| Government securities |
14,701,000
|
20,781,000
|
| Fixed income mutual funds |
7,585,000
|
11,904,000
|
| Corporate bonds and notes |
|
192,000
|
| Total marketable securities |
28,398,000
|
35,896,000
|
| Gross Unrealized Gains [Member] |
|
|
| OtherInvestmentsReadilyMarketableLineItems [Line Items] |
|
|
| Certificates of deposit |
|
|
| Government securities |
127,000
|
67,000
|
| Fixed income mutual funds |
91,000
|
|
| Corporate bonds and notes |
|
|
| Total marketable securities |
218,000
|
67,000
|
| Gross Unrealized Losses [Member] |
|
|
| OtherInvestmentsReadilyMarketableLineItems [Line Items] |
|
|
| Certificates of deposit |
(35,000)
|
(43,000)
|
| Government securities |
(10,000)
|
|
| Fixed income mutual funds |
|
915,000
|
| Corporate bonds and notes |
|
(14,000)
|
| Total marketable securities |
$ (45,000)
|
$ (972,000)
|