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Description of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Description of Business and Summary of Significant Accounting Policies [Abstract] |
Accumulated Other Comprehensive Income (Loss) |
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﻿ |  | 2017 |  | 2016 |  | 2015
﻿Total accumulated other comprehensive loss at beginning of period |  | $ | (468) |  | $ | (611) |  | $ | (348)
﻿Unrealized losses on investments |  |  |  |  |  |  |  |  |
﻿Balance at beginning of period |  | $ | (21) |  | $ | (39) |  | $ | (54)
﻿Other comprehensive income before reclassifications |  |  | 15 |  |  | 18 |  |  | 15
﻿Amounts reclassified from accumulated other comprehensive income (loss) to other income (loss) |  |  | — |  |  | — |  |  | —
﻿Balance at end of period |  | $ | (6) |  | $ | (21) |  | $ | (39)
﻿Foreign currency translation adjustment |  |  |  |  |  |  |  |  |
﻿Balance at beginning of period |  | $ | (447) |  | $ | (572) |  | $ | (294)
﻿Other comprehensive income before reclassifications |  |  | 660 |  |  | 532 |  |  | 156
﻿Amounts reclassified from accumulated other comprehensive income (loss) to other income (loss) |  |  | (173) |  |  | (407) |  |  | (434)
﻿Balance at end of period |  | $ | 40 |  | $ | (447) |  | $ | (572)
﻿Total accumulated other comprehensive income (loss) at end of period |  | $ | 34 |  | $ | (468) |  | $ | (611)
﻿

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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