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Stock-based Compensation (Details 3) - Restricted Stock Units [Member] - $ / shares
6 Months Ended
Jun. 19, 2017
May 19, 2017
Mar. 27, 2017
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]        
Balance at beginning       455,430
Granted 60,000 17,885 40,000 117,885 [1]
Vested       (186,666)
Forfeited      
Balance at ending [2]       386,649
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Balance at beginning       $ 0.76
Granted $ 6.00 $ 6.99 $ 8.35 6.95
Vested       2.18
Forfeited      
Balance at ending       $ 1.70
[1] 40,000 restricted stock units were granted on March 27, 2017 with a weighted average grant date fair value of $8.35, 17,885 restricted stock units were granted on May 19, 2017 with a weighted average grant date fair value of $6.99 and 60,000 restricted stock units were granted on June 19, 2017 with a weighted average grant date fair value of $6.00.
[2] At June 30, 2017, the total compensation cost related to non-vested restricted stock units not yet recognized was $1,229, which will be recognized over a weighted average period of 1.5 years, assuming the recipients complete their service period required for vesting.