| Schedule of Marketable Securities |
| Schedule of Marketable Securities |
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March 31, 2022 |
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| Fixed income mutual funds |
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$ |
14,389,000 |
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$ |
— |
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$ |
(490,000 |
) |
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$ |
13,899,000 |
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| Corporate bonds and notes |
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|
192,000 |
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|
— |
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(15,000 |
) |
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|
177,000 |
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| Total marketable securities |
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$ |
14,581,000 |
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|
$ |
— |
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|
$ |
(505,000 |
) |
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$ |
14,076,000 |
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December 31, 2021 |
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| Fixed income mutual funds |
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$ |
14,462,000 |
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$ |
— |
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$ |
(137,000 |
) |
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$ |
14,325,000 |
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| Corporate bonds and notes |
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|
813,000 |
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|
— |
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(12,000 |
) |
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|
801,000 |
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| Total marketable securities |
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$ |
15,275,000 |
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$ |
— |
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$ |
(149,000 |
) |
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$ |
15,126,000 |
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