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Warrants (Summary of Warrant Activity) (Details) - $ / shares shares in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Warrants Summary Of Warrant Activity Details |  |
Warrants, Outstanding as of beginning of period | 1,973 | 3,761
Granted with exercise price less than intrinsic value | 0 | 0
Granted with exercise price greater than intrinsic value | 0 | 0
Exercised | 0 | (460)
Canceled/expired | 0 | (1,328)
Warrants, Outstanding as of end of period | 1,973 | 1,973
Warrants, Weighted-Average Exercise Prices, Outstanding as of beginnig of period |  | $ 2.23
Warrants, Weighted-Average Exercise Prices, Granted less than intrinsic value | $ 0 | 0
Warrants, Weighted-Average Exercise Prices, Granted greater than intrinsic value | 0 | 0
Warrants, Weighted-Average Exercise Prices, Exercised | 0 | 1.97
Warrants, Weighted-Average Exercise Prices, cancelled or expired | 0 | $ 1.97
Warrants, Weighted-Average Exercise Prices, Outstanding as of end of period | $ 2.47 |
Warrants, Exercisable at end of period | 1,973 |
Warrants, Weighted-Average Exercise Price, Exercisable | $ 2.47 |

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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