Related Party Transactions, Board Member #2 (Details) - USD ($)	1 Months Ended								3 Months Ended		9 Months Ended	12 Months Ended
	Mar. 31, 2019	Feb. 28, 2019	Oct. 31, 2018	Sep. 30, 2018	Aug. 31, 2018	Jul. 31, 2018	Jan. 31, 2018	Dec. 31, 2016	Mar. 31, 2019	Mar. 31, 2018	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Aug. 31, 2016	Jul. 31, 2016	Jun. 30, 2016	Nov. 30, 2015
Related Party Transaction [Abstract]
Proceeds from issuance of stock									$ 750,000	$ 1,055,999
Board Member #2 [Member]
Related Party Transaction [Abstract]
Annual consulting fee									$ 15,000
Balance outstanding													$ 22,500			$ 22,500
PPM Price (in dollars per share)								$ 15.33						$ 29.22
Consulting fees	$ (13,781)										$ 11,250	$ 69,100
Board Member #2 [Member] | Convertible Promissory Notes Issued in July 2016 [Member]
Related Party Transaction [Abstract]
Convertible promissory note															$ 22,500
Convertible promissory note plus accrued interest								$ 23,020
Shares issued upon conversion (in shares)								984
Share price (in dollars per share)								$ 23.40
Shares issued (in shares)							886
Board Member #2 [Member] | Shares Issued in Lieu of Cash Compensation [Member]
Related Party Transaction [Abstract]
Options granted (in shares)			11,218
Grant price (in dollars per share)			$ 9.04
Board Member #2 [Member] | Convertible Promissory Notes Issued in November 2015 [Member]
Related Party Transaction [Abstract]
Convertible promissory note																	$ 1,000,000
Convertible promissory note plus accrued interest								$ 1,056,301
Share price (in dollars per share)								$ 23.38
Shares issued (in shares)							40,671	45,190
Board Member #2 [Member] | Shares Purchased in Conjunction with Stock Offering [Member]
Related Party Transaction [Abstract]
Share price (in dollars per share)		$ 15.33						$ 29.22
Shares issued (in shares)		22,834						8,556
Proceeds from issuance of stock		$ 350,000						$ 250,000
Warrant coverage		45.00%
Issuance of common stock for antidilution (in shares)	12,626
Board Member #2 [Member] | Convertible Promissory Notes Issued in August 2016 [Member]
Related Party Transaction [Abstract]
Convertible promissory note														$ 218,767
Convertible promissory note plus accrued interest								$ 223,442
Share price (in dollars per share)								$ 26.30
Shares issued (in shares)							7,647	8,496
Board Member #2 [Member] | Shares Issued for December 2016 PPM [Member]
Related Party Transaction [Abstract]
Shares issued (in shares)							7,700
Board Member #2 [Member] | Warrants Exercised [Member]
Related Party Transaction [Abstract]
Warrants exercised (in shares)					2,662	5,010
Exercise price of warrants (in dollars per share)					$ 13.03	$ 13.03
Proceeds from exercise of warrants					$ 34,686	$ 65,277
Board Member #2 [Member] | Stock Options Exercised [Member]
Related Party Transaction [Abstract]
Options exercised (in shares)			13,946	3,702
Exercise price (in dollars per share)			$ 6.87	$ 6.87
Proceeds from exercise of options			$ 95,693	$ 25,406