7. Share-based payments (Details 4)	3 Months Ended
	Mar. 31, 2016 shares
Common stock warrants issued	2,600,000
Vested - March 31, 2016	(420,000)
Nonvested - March 31, 2016	2,180,000
Vesting Condition One [Member]
Common stock warrants issued	350,000
Category	Performance
Vesting Condition Two [Member]
Common stock warrants issued	1,530,000
Category	Performance
Vesting Condition Three [Member]
Common stock warrants issued	720,000
Category	Service