Commitments and Contingencies - Minimum Lease Payments under Operating Leases and License Obligations (Detail)	Dec. 31, 2019 USD ($)
Leases [Abstract]
2020	$ 10,000
2021	10,000
2022	10,000
2023	10,000
2024	10,000
Thereafter	10,000
Total payments	60,000
2020	148,000
2021	2,000
2022	2,000
2023	0
2024	0
Thereafter	0
Total payments	$ 152,000

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License future minimum payments due in after fifth year.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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