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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2019

Accounting Policies [Abstract]

Summary of Available-for-sale Securities

The following is a summary of our available-for-sale securities as of September 30, 2019 and December 31, 2018:

		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
September 30, 2019
Guaranteed investment certificates		$	24,181			$	—			$	—			$	24,181
Corporate bonds			91,637				286				(326	)			91,597
Total available-for-sale securities		$	115,818			$	286			$	(326	)		$	115,778
December 31, 2018
Guaranteed investment certificates		$	23,096			$	—			$	—			$	23,096
Corporate bonds			90,707				—				(917	)			89,790
Total available-for-sale securities		$	113,803			$	—			$	(917	)		$	112,886
At September 30, 2019, maturities of our available-for-sale    securities were as follows:
Less than one year		$	78,271			$	183			$	(239	)		$	78,215
Greater than one year		$	37,547			$	103			$	(87	)		$	37,563

Schedule of Inventories

Inventories are stated at the lower of cost or net realizable value with cost determined on a first-in, first-out basis, and consist of the following:

		September 30, 2019				December 31, 2018
Raw materials		$	14,425			$	14,092
Work in process			838				544
Finished goods			9,777				8,252
		$	25,040			$	22,888

Computations of Basic and Diluted Earnings Per Share

The computations of basic and diluted earnings per share are as follows:

		Three Months								Nine Months
		Ended September 30,								Ended September 30,
		2019				2018				2019				2018
Net income		$	13,078			$	8,096			$	14,218			$	10,098
Weighted-average shares of common stock outstanding:
Basic			61,726				61,208				61,656				61,059
Dilutive effect of stock options, restricted stock, and performance stock units			417				1,398				516				1,480
Diluted			62,143				62,606				62,172				62,539
Earnings per share:
Basic		$	0.21			$	0.13			$	0.23			$	0.17
Diluted		$	0.21			$	0.13			$	0.23			$	0.16

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