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STATEMENTS OF CASH FLOWS DATA (Tables) | 12 Months Ended
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Dec. 31, 2015
STATEMENTS OF CASH FLOWS DATA |
Supplemental schedule of non-cash operating and investing activities |
|  | Year Ended December 31, |
|  | 2015 |  | 2014 |  | 2013 |
|  | (In thousands) |
Supplemental operating activities: |  |  |  |  |  |  |  |  |  |
Issuance of common stock for 401(k) matching contributions |  | $ | — |  | $ | 313 |  | $ | 839 |
Reclassification between deposits and other current assets |  | $ | — |  | $ | 190 |  | $ | 219 |
Supplemental investing activities: |  |  |  |  |  |  |  |  |  |
Net unrealized loss on marketable securities |  | $ | (129 | ) | $ | (70 | ) | $ | (54 | )

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