Earnings Per Common Share - Details of Computation of Earnings per Common Share, Basic and Diluted (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator for basic per share calculation:
Income from continuing operations for basic calculation	$ 940,836	$ 2,928,125	$ 2,544,961	$ 4,221,495
Income from discontinued operations, net of income tax expense		1,138,434		1,067,080
Net income for basic calculation	940,836	4,066,559	2,544,961	5,288,575
Numerator for diluted per share calculation:
Income from continuing operations	940,836	2,928,125	2,544,961	4,221,495
Adjustments to income from continuing operations for the impact of dilutive securities	0	0	0	0
Income from continuing operations for dilution calculation	940,836	2,928,125	2,544,961	4,221,495
Income from discontinued operations, net of income tax expense		1,138,434		1,067,080
Net income for dilution calculation	$ 940,836	$ 4,066,559	$ 2,544,961	$ 5,288,575
Denominator:
Weighted average common shares - basic	11,321,711	11,228,905	11,302,731	11,209,900
Effect of dilutive securities:
RSUs	142,094	125,413	146,490	134,028
Stock options	317,066	335,565	312,989	340,929
Weighted average common shares - diluted	11,780,871	11,689,883	11,762,210	11,684,857
Per common share amounts - basic:
Income from continuing operations	$ 0.08	$ 0.26	$ 0.23	$ 0.38
Income from discontinued operations		0.10		0.09
Net income	0.08	0.36	0.23	0.47
Per common share amounts - diluted:
Income from continuing operations	0.08	0.25	0.22	0.36
Income from discontinued operations		0.10		0.09
Net income	$ 0.08	$ 0.35	$ 0.22	$ 0.45