Stockholders' Equity - Warrants to Purchase Common Shares - Additional Information (Detail) - $ / shares			3 Months Ended
	Jun. 26, 2018	Mar. 28, 2018	Mar. 31, 2019	Mar. 31, 2018
Class of Stock [Line Items]
Warrants issued in connection with term loan facility			0	409,091
Exercise price of issued warrants				$ 1.10
Warrants [Member] | Investor [Member]
Class of Stock [Line Items]
Weighted average remaining life of lender warrants			6 years
Senior Secured Term Loan [Member] | Warrants [Member]
Class of Stock [Line Items]
Warrants issued in connection with term loan facility	77,721	409,091
Exercise price of issued warrants	$ 1.93	$ 1.10
Warrants exercise period	7 years	7 years