Current Debt - Embedded Derivatives (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 USD ($) $ / shares	Mar. 12, 2020 $ / shares	Oct. 17, 2018 $ / shares
Embedded derivatives
Carrying value of Notes	$ 6,300,000
Stock price (in dollars per share) | $ / shares				$ 0.25
Minimum
Embedded derivatives
Stock price (in dollars per share) | $ / shares			$ 0.06
Embedded derivatives
Embedded derivatives
Stock price (in dollars per share) | $ / shares	$ 0.16	$ 0.24
Fair Value Inputs Mandatory Redemption	10.00%
Fair Value Inputs Conversion Option		0.00%
Fair Value Inputs Note Maturity	90.00%
Embedded derivatives | Exercise Price
Embedded derivatives
Embedded derivative measurement input | $ / shares	0.50	0.50
Embedded derivatives | Expected Term
Embedded derivatives
Embedded derivative measurement input	7.8	7.8
Embedded derivatives | Stock Volatility
Embedded derivatives
Embedded derivative measurement input	0.40	0.40
Embedded derivatives | Risk-Free Interest Rate
Embedded derivatives
Embedded derivative measurement input	0.006	0.018
Convertible Notes
Embedded derivatives
Carrying value of Notes		$ 6,200,000
Unamortized debt discount	$ 1,000,000	1,100,000
Fair value of notes payable	5,800,000	6,200,000
Convertible Notes | Embedded derivatives
Embedded derivatives
Fair value of embedded derivatives	1,000,000	600,000
Net gain on changes in fair value of embedded derivatives		14,150
Non-convertible Promissory Note
Embedded derivatives
Carrying value of Notes	1,200,000	1,200,000
Unamortized debt discount	200,000	200,000
Fair value of notes payable	1,100,000	1,200,000
Non-convertible Promissory Note | Embedded derivatives
Embedded derivatives
Fair value of embedded derivatives	$ 200,000	$ 100,000