Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | Period [Axis] |
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2016-01-01 - 2016-12-31 |
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The following table summarizes stock-based compensation expense incurred under the 2008 Plan and included in our consolidated statements of earnings: (in thousands) | | Years Ended December 31, | | | | 2016 | | 2015 | | 2014 | | Cost of sales | | $ | 60 | | $ | 82 | | $ | 104 | | Research and development | | $ | 112 | | $ | 109 | | $ | 69 | | Selling, general, and administrative | | $ | 5,870 | | $ | 3,665 | | $ | 3,250 | | |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | For 2016, 2015, and 2014, the fair value of each option grant was estimated on the date of grant using the Black-Scholes option-pricing model, using the following weighted average assumptions: | | Years Ended December 31, | | | | 2016 | | 2015 | | 2014 | | Expected option life (years) | | 5.50 - 6.25 | | 5.50 - 6.25 | | 5.39 - 6.25 | | Risk-free interest rate | | 1.14% - 1.55% | | 1.31% - 1.82% | | 1.55% - 2.03% | | Expected stock price volatility | | 49.4% - 51.7% | | 47.9% - 50.5% | | 50.6% - 55.1% | | Dividend yield | | | | | | | | |
Schedule of Share-based Compansation, Stock Option And Restricted Stock, Activity | A summary of stock option activity under the Plan during the years ended December 31, 2016, 2015, and 2014 is presented below: | | | | | | | | Weighted | | | | | | | | | | Weighted | | Average | | | | | | | | Weighted | | Average | | Remaining | | | | (in thousands, except per share and | | Option | | Average | | Grant-date | | Term | | Aggregate | | remaining term data) | | Shares | | Exercise Price | | Fair Value | | (years) | | Intrinsic Value | | Outstanding December 31, 2013 | | | 120 | | $ | 50.35 | | | | | | 2.4 | | $ | 81 | | Granted | | | 120 | | | 31.59 | | $ | 16.84 | | | | | | | | Options previously granted, approved by shareholders | | | 325 | | | 6.39 | | | | | | | | | | | Exercised | | | (43) | | | 19.45 | | | | | | | | | 638 | | Forfeited | | | (4) | | | 6.36 | | | | | | | | | | | Expired | | | (60) | | | 73.96 | | | | | | | | | | | Outstanding December 31, 2014 | | | 458 | | $ | 14.44 | | | | | | 8.7 | | $ | 19,472 | | Granted | | | 138 | | | 62.07 | | $ | 30.08 | | | | | | | | Exercised | | | (89) | | | 9.24 | | | | | | | | | 3,937 | | Forfeited | | | (33) | | | 11.81 | | | | | | | | | | | Expired | | | - | | | - | | | | | | | | | | | Outstanding December 31, 2015 | | | 474 | | $ | 29.40 | | | | | | 8.2 | | $ | 10,136 | | Granted | | | 265 | | | 45.60 | | $ | 22.45 | | | | | | | | Exercised | | | (127) | | | 11.79 | | | | | | | | | 5,837 | | Forfeited | | | (32) | | | 47.84 | | | | | | | | | | | Expired | | | (2) | | | 139.32 | | | | | | | | | | | Outstanding December 31, 2016 | | | 578 | | $ | 39.28 | | | | | | 8.2 | | $ | 12,928 | | Exercisable at December 31, 2016 | | | 128 | | $ | 30.87 | | | | | | 7.1 | | $ | 4,033 | | Vested or expected to vest at December 31, 2016 | | | 567 | | $ | 39.11 | | | | | | 8.2 | | $ | 12,776 | | |
Nonvested Restricted Stock Shares Activity | A summary of RSA activity under the Plan during the years ended December 31, 2016, 2015, and 2014 is presented below: | | | | Weighted | | | | | | | | Average Grant | | Weighted Average | | (in thousands, except per share and | | | | Date Fair | | Remaining Term | | remaining term data) | | Shares | | Value | | (years) | | Unvested at December 31, 2013 | | | 50 | | $ | 10.20 | | | 2.8 | | Granted | | | 30 | | | 29.61 | | | | | Vested | | | (17) | | | 10.20 | | | | | Forfeited | | | - | | | - | | | | | Unvested at December 31, 2014 | | | 63 | | $ | 19.34 | | | 2.6 | | Granted | | | 28 | | | 67.26 | | | | | Vested | | | (23) | | | 15.82 | | | | | Forfeited | | | (5) | | | 19.41 | | | | | Unvested at December 31, 2015 | | | 63 | | $ | 42.72 | | | 2.2 | | Granted | | | 38 | | | 40.59 | | | | | Vested | | | (30) | | | 33.89 | | | | | Forfeited | | | (8) | | | 46.05 | | | | | Unvested at December 31, 2016 | | | 63 | | $ | 45.72 | | | 2.2 | | |