| Cash, Cash Equivalents and Investments [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | $ | 5,744 | | | $ | - | | | $ | 5,744 | | | $ | 3,715 | | | $ | - | | | $ | 3,715 | | | | | | 1,500 | | | | - | | | | 1,500 | | | | 3,506 | | | | (1 | | | | 3,505 | | Fixed income mutual funds | | | 1,284 | | | | (3 | | | | 1,281 | | | | 1,280 | | | | (4 | | | | 1,276 | | Total cash equivalents and marketable securities | | $ | 8,528 | | | $ | (3 | | | | 8,525 | | | $ | 8,501 | | | $ | (5 | | | | 8,496 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash on hand held in the United States | | | | | | | | | | | 4,583 | | | | | | | | | | | | 9,378 | | Cash on hand held overseas | | | | | | | | | | | 61,370 | | | | | | | | | | | | 53,332 | | | | | | | | | | | | | | 65,953 | | | | | | | | | | | | 62,710 | | Total cash, cash equivalents and marketable securities | | | | | | | | | | $ | 74,478 | | | | | | | | | | | $ | 71,206 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Cash and cash equivalents | | | | | | | | | | $ | 71,697 | | | | | | | | | | | $ | 66,425 | | Short-term marketable securities | | | | | | | | | | | 2,781 | | | | | | | | | | | | 4,781 | | | | | | | | | | | | | $ | 74,478 | | | | | | | | | | | $ | 71,206 | |
|