Convertible Redeemable Preferred Stock and Stockholders' Equity (Deficit): (Details 1) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Warrants
Outstanding and Exercisable at beginning	452,010
Expired/Forfeited
Granted	27,990	452,010
Assumed as part of reverse recapitalization	446,429
Outstanding and Exercisable at end	926,429	452,010
Weighted Average Exercise Price
Outstanding and Exercisable at beginning	$ 0.01
Expired/Forfeited
Granted	0.01	0.01
Assumed as part of reverse recapitalization	0.28
Outstanding and Exercisable at end	$ 0.14	$ 0.01