Commitments - Additional Information (Detail)		1 Months Ended				3 Months Ended
	Feb. 01, 2019 USD ($) ft²	Nov. 02, 2018 USD ($) ft²	Jul. 25, 2017 USD ($) ft²	Jun. 09, 2017 USD ($) ft²	Jun. 05, 2017 USD ($) ft²	Jan. 31, 2019 USD ($)
Commitments And Contingencies [Line Items]
Operating Leases, Rent Expense, Minimum Rentals						$ 50,000
San Diego, California [Member]
Commitments And Contingencies [Line Items]
Area of Land | ft²					21,908
Operating Leases, Rent Expense					$ 22,721
Lease Expiration Date					Jul. 31, 2022
Milford, Connecticut [Member] | Commitments [Member]
Commitments And Contingencies [Line Items]
Area of Land | ft²			13,750
Operating Leases, Rent Expense			$ 8,707
Lease Expiration Date			Aug. 31, 2019
NEW YORK | Commitments [Member] | K&K Unlimited [Member]
Commitments And Contingencies [Line Items]
Area of Land | ft²				12,000
Operating Leases, Rent Expense				$ 13,000
Lease Expiration Date				Jun. 30, 2018
Additional Lease Expiration Date				Jun. 30, 2021
NEW YORK | Commitments [Member] | 100 Bellport Avenue, LLC [Member]
Commitments And Contingencies [Line Items]
Area of Land | ft²		7,500
Operating Leases, Rent Expense		$ 5,625
Lease Expiration Date		Oct. 31, 2019
NEW YORK | Commitments [Member] | Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Operating Leases, Rent Expense	$ 9,375
NEW YORK | Commitments [Member] | Amendment [Member] | Subsequent Event [Member]
Commitments And Contingencies [Line Items]
Area of Land | ft²	5,000
Operating Leases, Rent Expense	$ 3,750
Lease Expiration Date	Oct. 31, 2019