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Commitments and Contingencies - Textual (Details)					1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 01, 2019 USD ($)	Mar. 18, 2018	Apr. 14, 2017 USD ($)	Oct. 22, 2013 USD ($)	Mar. 31, 2018 shares	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) ft² shares	Dec. 31, 2017 USD ($)	Dec. 31, 2016 shares	Mar. 21, 2018 USD ($)
Long-term Purchase Commitment [Line Items]
Options granted (in shares) | shares								1,120,500		660,557
Settlement of litigation, net								$ 0	$ 4,358,223
Greenberg Traurig
Long-term Purchase Commitment [Line Items]
Amount awarded from other party			$ 4,500,000
Litigation settlement interest				$ 6,000,000
Payments for legal settlements						$ 141,777
Settlement of litigation, net							$ 4,358,223
Greenberg Traurig, Scenario One
Long-term Purchase Commitment [Line Items]
Interest rate, net settlement proceeds, percentage				5.00%
Interest rate, net settlement proceeds, amount				$ 25,000,000
Greenberg Traurig, Scenario Two
Long-term Purchase Commitment [Line Items]
Interest rate, net settlement proceeds, percentage				8.00%
Interest rate, net settlement proceeds, amount				$ 25,000,000
Chief Accounting Officer
Long-term Purchase Commitment [Line Items]
Base salary											$ 210,000
Severance benefits, period					6 months
Severance benefits to be awarded upon termination after one year of employment, period					12 months
Chief Accounting Officer | Stock Option
Long-term Purchase Commitment [Line Items]
Annual performance bonus (in shares) | shares					100,000
Conditional award (in shares) | shares					50,000
Chief Accounting Officer | Stock Option, Sign-On Award
Long-term Purchase Commitment [Line Items]
Options granted (in shares) | shares					50,000
Sign on, vesting period		4 years			4 years
Jupiter, Florida Headquarters Lease
Long-term Purchase Commitment [Line Items]
Area of building rented | ft²								4,900
Monthly rental rate								$ 9,450
Netherlands Office Lease
Long-term Purchase Commitment [Line Items]
Area of building rented | ft²								258
Rent expense								$ 4,700
Netherlands Office Lease | Subsequent Event
Long-term Purchase Commitment [Line Items]
Rent expense	$ 4,000
Term of contract	1 year

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