Net loss per common share (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic earnings per share
Net loss per share from continuing operations, amount	$ 996,289	$ (197,340)	$ (1,095,933)	$ (231,365)
Net loss per share from continuing operations, number of shares	108,772,921	47,991,602	93,838,855	47,865,229
Net loss per share from continuing operations, per share	$ 0.01		$ (0.01)
Net income per share from discontinued operations, amount	$ (141,177)	$ 266,260	$ (82,185)	$ 443,779
Net income per share from discontinued operations, number of shares	108,772,921	47,991,602	93,838,855	47,865,229
Net income per share from discontinued operations, per share			$ 0.08
Basic income per share	$ 855,112	$ 68,920	$ 6,316,710	$ 212,414
Effect of dilutive securities
Warrants, number of shares	11,135,387	1,200,950	11,135,387	1,200,950
Diluted earnings per share
Net loss per share from continuing operations, amount	$ 996,289	$ (197,340)	$ (1,095,933)	$ (231,365)
Net loss per share from continuing operations, number of shares	119,908,308	49,192,552	104,974,243	49,066,179
Net loss per share from continuing operations, per share	$ 0.01		$ (0.01)
Net income per share from discontinued operations, amount	$ (141,177)	$ 266,260	$ (82,185)	$ 443,779
Net income per share from discontinued operations, number of shares	119,908,308	49,192,552	104,974,243	49,066,179
Net income per share from discontinued operations, per share	$ 0.01		$ 0.06