Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share, Out of Money Potential Common Shares (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Stock Options with an Exercise Price of $3.40 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	100,000	100,000	100,000	100,000
Stock Options with an Exercise Price of $3.43 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	40,000		40,000
Stock Options with an Exercise Price of $3.50 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	345,000	245,000	345,000	245,000
Stock Options with an Exercise Price of $3.51 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	959,500	984,670	959,500	984,670
Stock Options with an Exercise Price of $3.53 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	191,700	211,900	191,700	211,900
Stock Options with an Exercise Price of $3.90 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	20,000		20,000
Stock Options with an Exercise Price of $4.00 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	52,500	52,500	52,500	52,500
Stock Options with an Exercise Price of $5.00 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	100,000	300,000	100,000	300,000
Stock Options with an Exercise Price of $7.00 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	100,000	100,000	100,000	100,000
Warrants with an Exercise Price of $3.60 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	1,562,500	1,562,500	1,562,500	1,562,500
Warrants with an Exercise Price of $5.25 Per Share [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded		100,000		100,000
Options and Warrants Excluded from Diluted EPS [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Out of the money options and warrants excluded	3,471,200	3,656,570	3,471,200	3,656,570

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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