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Stock Compensation (Tables) | 6 Months Ended
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Jun. 30, 2018
Stock Compensation [Abstract] |
Schedule Of Weighted-Average Assumptions Used To Determine The Fair Value Of Options |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | Three Months Ended |  | Six Months Ended
﻿ | June 30, 2018 |  | June 30, 2018
﻿ | Stock Options |  | ESPP Options |  | Stock Options |  | ESPP Options
﻿Expected life of options |  | N/A |  |  | 0.5 Years |  |  | 5.0 Years |  |  | 0.5 Years
﻿Expected stock price volatility |  | N/A |  |  | 0.35 |  |  | 0.40 |  |  | 0.35
﻿Risk-free interest rate |  | N/A |  |  | 1.53% |  |  | 2.64% |  |  | 1.53%
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | Three Months Ended |  | Six Months Ended
﻿ | June 30, 2017 |  | June 30, 2017
﻿ | Stock Options |  | ESPP Options |  | Stock Options |  | ESPP Options
﻿Expected life of options |  | N/A |  |  | 0.5 Years |  |  | 4.75 Years |  |  | 0.5 Years
﻿Expected stock price volatility |  | N/A |  |  | 0.35 |  |  | 0.40 |  |  | 0.35
﻿Risk-free interest rate |  | N/A |  |  | 0.62% |  |  | 1.87% |  |  | 0.62%
﻿ ﻿ ﻿
Summary Of Total Stock Compensation Expenses |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ | Three Months Ended |  | Six Months Ended
﻿ | June 30, |  | June 30,
﻿ | 2018 |  | 2017 |  | 2018 |  | 2017
﻿RSA, PSA, RSU, and PSU expense | $ | 1,521 |  | $ | 1,532 |  | $ | 2,469 |  | $ | 2,877
﻿Stock option and ESPP option expense |  | 483 |  |  | 578 |  |  | 889 |  |  | 1,096
﻿Total stock compensation expense | $ | 2,004 |  | $ | 2,110 |  | $ | 3,358 |  | $ | 3,973
﻿

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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