Rendering
| Component: (Network and Table) |
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| Network | 30903 - Disclosure - Shareholders' Equity (Tables) (http://www.arthrt.com/role/DisclosureShareholdersEquityTables) |
| Table | (Implied) |
Slicers (applies to each fact value in each table cell)
| Reporting Entity [Axis] | 0000819689 (http://www.sec.gov/CIK) |
| Shareholders' Equity [Abstract] | Period [Axis] |
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2016-01-01 - 2016-12-31 |
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Shareholders' Equity [Abstract] | |
Fair Value of Option Grants |
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Years Ended
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December 31,
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2016
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2015
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Expected option term
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6.0 to 6.5
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4.0 to 6.5
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Expected volatility factor
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23.7% to 24.4%
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23.8% to 26.7%
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Risk-free rate
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.90% to .99%
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.90% to 1.28%
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Expected annual dividend yield
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—%
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—%
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Stock Option Transactions |
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Weighted
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Weighted
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average
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Average
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remaining
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Aggregate
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Number of
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Exercise
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contractual
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Intrinsic
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options
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Price
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term (in years)
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Value
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Outstanding at December 31, 2015
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184,500
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$
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6.21
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6.80
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$
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235,293
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Granted
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45,000
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4.07
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Exercised
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(15,000)
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3.41
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Outstanding at December 31, 2016
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214,500
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$
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5.96
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7.12
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$
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17,340
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Exercisable at December 31, 2016
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109,495
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$
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6.90
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5.47
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$
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8,880
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Exercisable at December 31, 2015
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83,500
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$
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6.60
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4.73
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$
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106,565
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