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Stock-Based Compensation (Policies)	9 Months Ended
Stock-Based Compensation (Policies)	Sep. 30, 2018
Share-based Compensation [Abstract]
Compensation-Stock Based Compensation	The Company recognizes stock-based compensation in accordance with the provisions of ASC Topic 718, Compensation-Stock Compensation. Stock-based compensation expense, excluding compensation charges related to our employee stock purchase plan, or the ESPP, was $849 and $785 for the three months ended September 30, 2018 and 2017, respectively, and $2,417 and $2,577 for the nine months ended September 30, 2018 and 2017, respectively. As of September 30, 2018, there was $2,621 of total unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted-average period of 3.00 years. As of September 30, 2018, there was $4,192 of total unrecognized compensation expense related to restricted stock awards, which is expected to be recognized over a weighted-average period of 2.26 years.