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CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS - Long-term Investments, Cortina (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2004 | Dec. 31, 2016 | Dec. 31, 2015
ImmenStar, Inc. | Series A preferred stock |  |  |
CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS |  |  |
Payments to acquire investments | $ 2.0 |  |
Cortina |  |  |
CASH, CASH EQUIVALENTS AND SHORT AND LONG TERM INVESTMENTS |  |  |
Gain on sale of shares |  | $ 0.1 | $ 1.6

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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 + Details
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