Consolidated Statements of Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Public offering, shares	575,000	910,000
Public offering, shares	620,650
Exercise of warrants, shares		386,343
Issuance of common stock, shares	234,858	479,138
Issuance of common stock Pelican, shares	133,106