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Stockholders' Equity (Details 7) - Warrant [Member] - $ / shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Outstanding - Warrants 564,272 564,272
Granted - Warrants 0 0
Exercised - Warrants (118,959) 0
Forfeited/Expired - Warrants 0 0
Outstanding - Warrants 445,313 564,272
Outstanding - Weighted Average Exercise Price at beginning of year $ 4.14 $ 4.14
Granted - Weighted Average Exercise Price 0 0
Exercised - Weighted Average Exercise Price 2.20 0
Forfeited/Expired - Weighted Average Exercise Price 0 0
Outstanding - Weighted Average Exercise Price at end of year $ 4.65 $ 4.14