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Commitments and Contingencies - Textual (Details)
1 Months Ended 3 Months Ended
Feb. 01, 2019
USD ($)
Mar. 31, 2018
USD ($)
shares
Mar. 31, 2019
USD ($)
ft²
shares
Long-term Purchase Commitment [Line Items]      
Options granted (in shares)     989,000
Chief Accounting Officer      
Long-term Purchase Commitment [Line Items]      
Base salary | $   $ 210,000  
Severance benefits, period   12 months  
Chief Accounting Officer | Stock Option      
Long-term Purchase Commitment [Line Items]      
Annual performance bonus (in shares)   100,000  
Conditional award (in shares)   50,000  
Chief Accounting Officer | Stock Option, Sign-On Award      
Long-term Purchase Commitment [Line Items]      
Options granted (in shares)   50,000  
Sign on, vesting period   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 | $ $ 4,000   $ 4,700
Term of contract 1 year