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Stock-Based Compensation - The Plans (Details) - RSU's
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended
Mar. 31, 2016
USD ($)
$ / shares
shares
Weighted Average Grant-Date Fair Value  
Total intrinsic value of the restricted stock units outstanding | $ $ 0.1
The Plans  
Number of Shares  
Non-vested shares at the beginning of the year | shares 241
Vested (in shares) | shares (107)
Cancelled (in shares) | shares (14)
Non-vested shares at the end of the year | shares 120
Weighted Average Grant-Date Fair Value  
Non-vested shares at the beginning of the year (in dollars per share) | $ / shares $ 4.61
Vested (in dollars per share) | $ / shares 4.62
Cancelled (in dollars per share) | $ / shares 4.62
Non-vested shares at the end of the year (in dollars per share) | $ / shares $ 4.61