Summary of Significant Accounting Policies and Significant Judgments and Estimates - Stock Option Activity (Detail) - $ / shares	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Oct. 01, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Outstanding, Unvested	26,700
Grants, Unvested	0
Vested, Unvested	0
Exercises, Unvested	0
Cancellations/forfeitures, Unvested	(600)
Ending Balance,Outstanding, Unvested	26,100	26,700
Beginning balance, Outstanding, Vested	216,981
Grants, Vested	0
Vested	0
Exercises, Vested	0
Cancellations/forfeitures, Vested	(900)
Ending Balance, Outstanding, vested	216,081	216,981
Number of Shares, Outstanding, Beginning balance	243,681
Number of Shares, Grants	0
Number of Shares, Vested	0
Number of Shares, Exercises	0
Number of Shares, Cancellations/forfeitures	(1,500)
Number of Shares, Outstanding, Ending Balance	242,181	243,681
Weighted Average Exercise Price, Outstanding, Beginning Balance	$ 8.69
Weighted Average Exercise Price, Cancellation/ forfeitures	4.88
Weighted Average Exercise Price, Ending Balance	$ 8.71	$ 8.69
Weighted Average Contractual Life	4 years 3 months 22 days	4 years 6 months 25 days