Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued Compensation	$ 467,522	$ 213,756
Sales return allowance	726,892	1,101,658
Technology fees	450,000	450,000
ContractManufacturer	320,000	160,000
Professional services	863,000	391,000
Operating Lease, Liability, Current	580,284	577,460
Warranty reserve	116,000	129,837
Accrued Advertising	61,200	171,000
Other	178,295	143,580
Accrued expenses	$ 3,036,301	$ 2,236,633