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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2016

Stock-Based Compensation Expense

The following table presents stock-based compensation expense included in the Company’s consolidated statements of comprehensive income (in thousands):

		Three months ended June 30,								Six months ended June 30,
		2016				2015				2016				2015
Cost of product revenue		$	84			$	63			$	144			$	106
Research and development			105				90				185				159
Selling, general and administrative			948				832				1,730				1,422
Total		$	1,137			$	985			$	2,059			$	1,687

Summary of Option Activity

Information regarding option activity for the six months ended June 30, 2016 under the Plans is summarized below:

		Options Outstanding				Weighted- Average Exercise Price Per Share				Weighted- Average Remaining Contractual Term (in years)				(in thousands) Aggregate Intrinsic Value
Options outstanding at January 1, 2016			1,240,935			$	10.44
Granted			331,203				12.40
Exercised			(170,919	)			5.89
Forfeited/Cancelled			(85,480	)			7.69
Options outstanding at June 30, 2016			1,315,739			$	11.70				7.33			$	21,147
Options exercisable at June 30, 2016			514,898			$	9.49				5.17			$	9,402
Vested and expected to vest at June 30, 2016 (1)			1,223,223			$	11.88				7.26			$	19,473

⁽¹⁾  This represents the number of vested options as of June 30, 2016 plus the number of unvested options expected to vest as of June 30, 2016 based on the unvested outstanding options at June 30, 2016 adjusted for estimated forfeiture rates of 8% for awards granted to non-executive level employees and 3% for awards granted to executive level employees.

X

- Definition

Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

+ 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=6415400&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 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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X

- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ 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 (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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