Debt (Details)		1 Months Ended	12 Months Ended
	May 09, 2018 USD ($) tranche D $ / shares	Nov. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Debt
Aggregate purchase price in cash			$ 2,000,000
Debt discount	$ 225,000
Secured convertible promissory note
Debt
Aggregate principal amount	3,325,000
Aggregate purchase price in cash	2,000,000
Original issue discount	300,000
Initial principal amount	$ 2,225,000
Debt issuance costs			200,000
Bearing interest rate (as percent)	10.00%
Maximum monthly redemption amount	$ 500,000
Stock price (in dollars per share) | $ / shares	$ 1.60
Redemption price (as percent)	80.00%
Number of consecutive trading days (in days) | D	20
Debt discount	$ 200,000
Cash redemption payments		$ 800,000	800,000
Payment on redemption interest			131,058
Remaining principal amount			$ 1,600,000
Secured convertible promissory note | Maximum
Debt
Redemption price per share | $ / shares	$ 1.60
Secured convertible promissory note | Investor Notes
Debt
Aggregate principal amount	$ 1,000,000
Number of tranches | tranche	4
Periodic payment of debt	$ 250,000
Debt discount	$ 25,000