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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Option Activity

A summary of option activity under our 1998 Stock Option Plan as of December 31, 2017, and changes during the six months ended June 30, 2018 is presented below.

			Number  of Stock Options						Weighted Average Exercise  Price						Weighted  Average  Remaining  Contractual Life (years)						Aggregate  Intrinsic  Value (in thousands)
Outstanding, December 31, 2017			327,270						$	20.21					4.28						$	2,255
Exercised			(8,500)						18.51						—						86
Canceled/Forfeited			(500)						28.15						—						—
Outstanding, June 30, 2018			318,270						$	20.24					3.82						$	1,579
Exercisable, June 30, 2018			296,738						$	19.67					3.47						$	1,579

Summary of Stock Options Outstanding

The following table summarizes information about our stock options outstanding at June 30, 2018:

Range of Exercise Prices			Options Outstanding																														Options Exercisable
						Shares						Weighted Average Remaining Contractual Life (years)						Weighted Average Exercise Price						Shares						Weighted Average Exercise Price
$0.01-15.70			65,852						1.06						$	9.82					65,852						$	9.82
$15.71-17.81			67,750						1.37						17.53						67,750						17.53
$17.82-20.48			54,250						2.97						19.39						54,250						19.39
$20.49-33.36			130,418						6.83						27.26						108,886						27.09
			318,270						3.82						$	20.24					296,738						$	19.67

Status of Unvested Stock Options

The summary of the status of our unvested stock options as of December 31, 2017 and changes during the six months ended June 30, 2018 is presented below.

Unvested stock options:			Shares						Weighted Average Grant Date Fair Value Per Share
Unvested at December 31, 2017			48,581						$	11.41
Vested			(26,549)						10.97
Canceled/Forfeited			(500)						11.93
Unvested at June 30, 2018			21,532						$	11.93

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- References

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

+ 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 (d)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Tabular disclosure of the change in stock options.

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