Net loss per share (Tables)

3 Months Ended

Mar. 31, 2016

Net loss per share [Abstract]

Schedule of Antidilutive Securities Excluded from Calculation of Earnings Per Share

The following table lists shares and warrants that were excluded from the calculation of diluted earnings per share as the inclusion of shares from the assumed exercise of such options and warrants and the conversion of such preferred shares would be anti-dilutive:

	For the Three Months Ended
	March 31, 2016	March 31, 2015
Stock options	75	86
Warrants	206	184
Preferred shares as if converted
Series A-1 Preferred Stock	50	46
Series B Preferred Stock	1,069	968
Series C Preferred Stock	579	525
Series D-1 Preferred Stock	1,144	992
Series D-2 Preferred Stock	763	691