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Investments in Marketable Securities Available-for-Sale | 12 Months Ended
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Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities [Text Block] |
| Note 4. | Investments in Marketable Securities Available-for-Sale
Following is a summary of marketable securities as of December 31, 2015 and 2016:
|  | December 31, 2015 |
|  |  |  | Gross |  | Gross |  | Aggregate |
|  | Aggregate |  | Unrealized |  | Unrealized |  | Market |
|  | Cost |  | Gains |  | Losses |  | Value |
|  | (in thousands) |
Time deposit with original maturities more than three months |  | $ | 5,546 |  |  | 2 |  |  | (120) |  |  | 5,428 |
Money market fund |  |  | 13,244 |  |  | 18 |  |  | (179) |  |  | 13,083 |
Total |  | $ | 18,790 |  |  | 20 |  |  | (299) |  |  | 18,511 |
|  | December 31, 2016 |
|  |  |  | Gross |  | Gross |  | Aggregate |
|  | Aggregate |  | Unrealized |  | Unrealized |  | Market |
|  | Cost |  | Gains |  | Losses |  | Value |
|  | (in thousands) |
Time deposit with original maturities more than three months |  | $ | 5,539 |  |  | - |  |  | (399) |  |  | 5,140 |
Money market fund |  |  | 4,968 |  |  | 49 |  |  | - |  |  | 5,017 |
Total |  | $ | 10,507 |  |  | 49 |  |  | (399) |  |  | 10,157 |
The Company’s portfolio of available for sale marketable securities by contractual maturity or the expected holding period as of December 31, 2015 and 2016 is due in one year or less. Information on sales of available for sale marketable securities for the years ended December 31, 2014, 2015 and 2016 is summarized below.
|  | Proceeds |  | Gross |  | Gross |
Period |  | from sales |  | realized gains |  | realized losses |
|  |  |  |  | (in thousands) |  |  |  |
Year 2014 |  | $ | 22,021 |  |  | 15 |  |  | (46) |
Year 2015 |  | $ | 46,720 |  |  | 261 |  |  | (38) |
Year 2016 |  | $ | 38,532 |  |  | 137 |  |  | (127) |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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