Commitments and Contingencies - Additional Information (Details) - USD ($)	12 Months Ended	24 Months Ended
	Dec. 31, 2019	Dec. 31, 2007	Dec. 31, 2018	Dec. 31, 2006
Commitments and Contingencies [Line Items]
Accrued payroll and compensation	$ 3,193,000		$ 2,940,000
License Agreement [Member]
Commitments and Contingencies [Line Items]
Shares issued		84,678
Royalty on net sales sublicensing gross revenue	10.00%
Transition Agreement [Member]
Commitments and Contingencies [Line Items]
Payment period on transition and health benefits	15 months
Transition Agreement [Member] | Bonus [Member]
Commitments and Contingencies [Line Items]
Accrued payroll and compensation	$ 200,000
Transition Agreement [Member] | Other Accrued Expenses [Member]
Commitments and Contingencies [Line Items]
Transition payments and health benefits	$ 1,000,000
Minimum [Member] | License Agreement [Member]
Commitments and Contingencies [Line Items]
Annual license fee payable				$ 5,000
Percentage of royalty on net sales	0.50%
Maximum [Member] | License Agreement [Member]
Commitments and Contingencies [Line Items]
Annual license fee payable				$ 25,000
Percentage of royalty on net sales	3.50%