Earnings Per Common Share - Details of Computation of Earnings per Common Share, Basic and Diluted (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator for basic per share calculation:
Income from continuing operations for basic calculation	$ 465,665	$ 1,507,673	$ 3,010,626	$ 5,729,168
Income from discontinued operations, net of income tax expense	0	136,753	0	1,203,833
Net income for basic calculation	465,665	1,644,426	3,010,626	6,933,001
Numerator for diluted per share calculation:
Income from continuing operations	465,665	1,507,673	3,010,626	5,729,168
Adjustments to income from continuing operations for the statements of operations impact of dilutive securities	0	0	0	0
Income from continuing operations for dilution calculation	465,665	1,507,673	3,010,626	5,729,168
Income from discontinued operations, net of income tax expense	0	136,753	0	1,203,833
Net income for dilution calculation	$ 465,665	$ 1,644,426	$ 3,010,626	$ 6,933,001
Denominator:
Weighted average common shares - basic	11,320,904	11,236,188	11,308,833	11,218,759
Effect of dilutive securities:
RSUs	150,070	147,456	130,191	134,864
Stock options	293,236	337,556	306,475	339,825
Weighted average common shares - diluted	11,764,210	11,721,200	11,745,499	11,693,448
Per common share amounts - basic:
Income from continuing operations	$ 0.04	$ 0.13	$ 0.27	$ 0.51
Income from discontinued operations	0.00	0.02	0.00	0.11
Net income	0.04	0.15	0.27	0.62
Per common share amounts - diluted:
Income from continuing operations	0.04	0.13	0.26	0.49
Income from discontinued operations	0.00	0.01	0.00	0.10
Net income	$ 0.04	$ 0.14	$ 0.26	$ 0.59