Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued Compensation	$ 1,029,747	$ 786,184
Sales return allowance	1,405,117	666,375
Technology fees	450,000	450,000
Professional services	341,000	603,000
Warranty reserve	177,152	127,361
Accrued Advertising	99,400	160,800
Other	263,958	234,779
Accrued expenses	$ 2,361,257	$ 2,362,124