Net Loss Per Share Attributable to Common Stockholders- Calculation (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Calculation of basic and diluted net loss per common share
Net loss attributable to common stockholders	$ (4,715,358)	$ (3,984,204)	$ (14,733,780)	$ (16,637,924)
Shares used to compute net loss per common share, basic and diluted (in shares)	14,157,351	9,307,354	10,951,178	6,153,139
Net loss per share attributable to common shareholders, basic and diluted	$ (0.33)	$ (0.43)	$ (1.35)	$ (2.70)

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

No definition available.

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