Stockholders' Equity - Additional Information - Shares Issued for Consulting Services (Detail) - USD ($)		6 Months Ended
	Sep. 28, 2016	Jun. 30, 2017
Common Stock [Member]
Schedule Of Stockholders Equity [Line Items]
Fully-vested restricted shares of common stock issued to third party consulting services, Shares	418,750
Fully-vested restricted shares of common stock issued to third party consulting services, contract period	1 year
Prepaid Expenses and Other Current Assets [Member]
Schedule Of Stockholders Equity [Line Items]
Remaining expenses recorded for consulting services		$ 209,375
Selling, General and Administrative Expenses [Member]
Schedule Of Stockholders Equity [Line Items]
Expenses recorded for consulting services		$ 837,500