Quarterly report pursuant to Section 13 or 15(d)

5. STOCKHOLDERS' EQUITY (DEFICIT) (Details 1)

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5. STOCKHOLDERS' EQUITY (DEFICIT) (Details 1)
3 Months Ended
Mar. 31, 2018
$ / shares
shares
Shares  
Outstanding at beginning of period | shares 3,276,043
Forfeited | shares (12,500)
Expired | shares (2,334)
Granted | shares 868,700
Exercised | shares (1,959)
Outstanding at end of period and expected to vest | shares 4,127,950
Options exercisable | shares 1,452,273
Weighted Average Exercise Price  
Outstanding at beginning of period | $ / shares $ 5.52
Forfeited | $ / shares 3.58
Expired | $ / shares 2.68
Granted | $ / shares 3.72
Exercised | $ / shares 2.68
Outstanding at end of period and expected to vest | $ / shares 5.15
Options exercisable | $ / shares $ 7.51