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13. Valuation of Marketable Securities | 12 Months Ended
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Dec. 31, 2014
Valuation Of Marketable Securities |
Valuation of Marketable Securities | In October 2010 Zoom Telephonics, Inc. entered into an agreement with Zoom Technologies, Inc. (Nasdaq: ZOOM) in which Zoom Telephonics transferred its rights to the zoom.com domain name and certain trademark rights in exchange for shares of Zoom Technologies common stock. The Company valued the marketable securities at market value in the financial statements. In December 2013 the Company sold all shares of Zoom Technologies, Inc. stock. The Company received proceeds of $40 thousand and reported a realized loss of $273 thousand in 2013.

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- Definition Disclosure of accounting policy for not readily marketable securities, valuation methods and significant assumptions used to determine fair value, restrictions on the investment and reasons investments are not readily marketable, including securities that are not registered, investments in nonpublic entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51655414&loc=d3e18780-107790 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 820 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35710923&loc=d3e45360-110995 + Details
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