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Stockholders' Equity (Details 1) - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares, Exercised (in shares) | (4,710) |
Shares Exercisable at the end of period (in shares) | 64,400 |
Weighted Average Exercise Price, Exercisable at the end of period (in dollars per share) | $ 5.26 |
Shares Outstanding at the end of period (in shares) | 143,094 |
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share) | $ 5.22 |
Employee Stock Option [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares Exercisable, beginning of period (in shares) | 63,800 | 132,099
Shares, Vested (in shares) | 30,381 | 34,801
Shares, Exercised (in shares) | 4,906 | 29,500
Shares, Cancelled (in shares) | (6,000) | (73,000)
Shares Exercisable at the end of period (in shares) | 83,275 | 63,800
Weighted Average Exercise Price, Exercisable, beginning of period (in dollars per share) | $ 5.26 | $ 5.07
Weighted Average Exercise Price, Vested (in dollars per share) | 5.22 | 5.65
Weighted Average Exercise Price, Exercised (in dollars per share) | 5.15 | 2.88
Weighted Average Exercise Price, Cancelled (in dollars per share) | 5.96 | 6.06
Weighted Average Exercise Price, Exercisable at the end of period (in dollars per share) | $ 5.2 | $ 5.26
Shares Outstanding, beginning of period (in shares) | 154,000 | 214,500
Shares, Granted (in shares) | 0 | 49,000
Shares Exercised (in shares) | 4,906 | 29,500
Shares Cancelled (in shares) | (6,000) | (80,000)
Shares Outstanding at the end of period (in shares) | 143,094 | 154,000
Weighted Average Exercise Price, Outstanding, beginning of period (in dollars per share) | $ 5.25 | $ 5.2
Weighted Average Exercise Price, Granted (in dollars per share) | 0 | 5.27
Weighted Average Exercise Price, Exercised (in dollars per share) | 5.15 | 2.88
Weighted Average Exercise Price, Cancelled (in dollars per share) | 5.96 | 6.01
Weighted Average Exercise Price, Outstanding at the end of period (in dollars per share) | $ 5.22 | $ 5.25

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