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Available-for-Sale Investments
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9 Months Ended |
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Sep. 30, 2014
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| Available-for-Sale Investments [Abstract] | |
| Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure | Available-for-Sale Investments Available-for-sale investments consist of assets held as part of the Spire Corporation Non-Qualified Deferred Compensation Plan. These investments have been classified as available-for-sale investments and are reported at fair value, with unrealized gains and losses included in accumulated other comprehensive income. The unrealized gain on these marketable securities was zero and $393 thousand as of September 30, 2014 and December 31, 2013, respectively. During the nine months ended September 30, 2014, the Company recorded a realized gain on the sale of available-for-sale investments of $541 thousand. The participant of the deferred compensation plan retired as Chief Executive Officer and President of the Company on December 31, 2013. The participant received deferred compensation payments of approximately $1.2 million in January 2014 and $2.8 million in May 2014, which was funded by the sale of these securities. |