Equity Incentive Plan - Summary of Company's Restricted Stock (Detail) - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options Outstanding, Weighted Average Exercise Price, and Additional Disclosures [Abstract]
Number of Restricted Shares, Nonvested at beginning of period	16,983
Number of Restricted Shares, Granted		16,983
Number of Restricted Shares, Vested	0	0
Number of Restricted Shares, Forfeited	0	0
Number of Restricted Shares, Nonvested at June 30, 2015	16,983	16,983
Weighted Average Grant Date Fair Value, Nonvested at beginning of period	$ 10.82
Weighted Average Grant Date Fair Value, Granted		$ 10.82
Weighted Average Grant Date Fair Value, Vested	0	0
Weighted Average Grant Date Fair Value, Forfeited	0	0
Weighted Average Grant Date Fair Value, Nonvested at June 30, 2015	$ 10.82	$ 10.82