Stockholders' Equity (Details 5)	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Class of Warrant or Right [Line Items]
Outstanding warrants, Beginning Balance	6,046,540
Warrants Issued	673,600
Warrants Exercised	(199,570)
Warrants Expired	0
Outstanding warrants, Ending Balance	6,520,570
ZNWAD [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 1.00
Outstanding warrants, Ending Balance	243,853
Warrant Transactions [Member] | ZNWAA [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 2.00
Warrant Termination Date	Jan. 31, 2021
Outstanding warrants, Beginning Balance	1,498,804
Warrants Issued	0
Warrants Exercised	0
Warrants Expired	0
Outstanding warrants, Ending Balance	1,498,804
Warrant Transactions [Member] | ZNWAD [Member]
Class of Warrant or Right [Line Items]
Warrant Termination Date	May 02, 2021
Outstanding warrants, Beginning Balance	243,853
Warrants Issued	0
Warrants Exercised	0
Warrants Expired	0
Warrant Transactions [Member] | ZNWAE [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 1.00
Warrant Termination Date	May 02, 2021
Outstanding warrants, Beginning Balance	2,144,510
Warrants Issued	0
Warrants Exercised	(40)
Warrants Expired	0
Outstanding warrants, Ending Balance	2,144,470
Warrant Transactions [Member] | ZNWAF [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 1.00
Warrant Termination Date	Aug. 14, 2021
Outstanding warrants, Beginning Balance	359,610
Warrants Issued	0
Warrants Exercised	0
Warrants Expired	0
Outstanding warrants, Ending Balance	359,610
Warrant Transactions [Member] | ZNWAG [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 1.00
Warrant Termination Date	Jan. 08, 2021
Outstanding warrants, Beginning Balance	240,578
Warrants Issued	0
Warrants Exercised	0
Warrants Expired	0
Outstanding warrants, Ending Balance	240,578
Warrant Transactions [Member] | ZNWAI [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 3.00
Warrant Termination Date	Jun. 29, 2021
Outstanding warrants, Beginning Balance	640,735
Warrants Issued	0
Warrants Exercised	(5)
Warrants Expired	0
Outstanding warrants, Ending Balance	640,730
Warrant Transactions [Member] | ZNWAH [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 5.00
Warrant Termination Date	Apr. 19, 2021
Outstanding warrants, Beginning Balance	372,400
Warrants Issued	0
Warrants Exercised	0
Warrants Expired	0
Outstanding warrants, Ending Balance	372,400
Warrant Transactions [Member] | ZNWAJ [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 1.00
Warrant Termination Date	Oct. 29, 2021
Outstanding warrants, Beginning Balance	546,050
Warrants Issued	0
Warrants Exercised	(25)
Warrants Expired	0
Outstanding warrants, Ending Balance	546,025
Warrant Transactions [Member] | ZNWAK [Member]
Class of Warrant or Right [Line Items]
Exercise Price | $ / shares	$ 0.01
Warrant Termination Date	Feb. 25, 2021
Outstanding warrants, Beginning Balance	0
Warrants Issued	673,600
Warrants Exercised	(199,500)
Warrants Expired	0
Outstanding warrants, Ending Balance	474,100