Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plan (Details)

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Equity Incentive Plan (Details) - Equity Incentive Plan 2014 [Member] - $ / shares
 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of Options, Outstanding beginning of year 1,277,367 752,372 752,372  
Number of Options, Granted 252,256 435,393    
Number of Options, Exercised (86,765) (23,075)    
Number of Options, Expired/Forfeited (12,362) (8,600)    
Number of Options, Outstanding at end of period 1,430,496 1,156,090 1,277,367 752,372
Number of Options, Exercisable at end of period 909,868 841,031    
Number of Options, Vested and expected to vest at end of period 909,868 841,031    
Weighted- Average Exercise Price, Outstanding at beginning of year $ 2.75 $ 0.91 $ 0.91  
Weighted- Average Exercise Price, Granted 2.96 5.8    
Weighted- Average Exercise Price, Exercised 0.65 0.65    
Weighted- Average Exercise Price, Expired/Forfeited 3.93 0.65    
Weighted- Average Exercise Price, Outstanding at end of period 2.95 2.69 $ 2.75 $ 0.91
Weighted- Average Exercise Price, Exercisable at end of period 2.84 2.7    
Weighted- Average Exercise Price, Vested and expected to vest at end of period $ 2.84 $ 2.7    
Weighted-Average Contractual Life (In Years), Outstanding 5 years 2 months 23 days 4 years 10 months 2 days 4 years 11 months 8 days 4 years 6 months 18 days
Weighted-Average Contractual Life (In Years), Granted 9 years 8 months 12 days 9 years 7 months 17 days    
Weighted-Average Contractual Life (In Years), Exercisable at end of period 4 years 4 months 17 days 4 years 9 months    
Weighted-Average Contractual Life (In Years), Vested and expected to vest at end of period 4 years 4 months 17 days 4 years 9 months