Stock-Based Compensation - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended		3 Months Ended		6 Months Ended				6 Months Ended		0 Months Ended	6 Months Ended		0 Months Ended	3 Months Ended	12 Months Ended
	Apr. 22, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014 Employees	Jun. 30, 2013 Employees	Jun. 30, 2014 Employees	Jun. 30, 2013 Employees	Jun. 30, 2014 Two Thousand Three Plan	Sep. 18, 2003 Two Thousand Three Plan	Jun. 30, 2014 Two Thousand Three Plan Maximum	Dec. 31, 2010 Amended Two Thousand Three Plan	May 12, 2014 2013 Stock Incentive Plan	Jun. 30, 2014 2013 Stock Incentive Plan	Jun. 30, 2014 Employee Restricted Stock Plan	Apr. 21, 2014 Restricted Stock	Jun. 30, 2014 Restricted Stock	Dec. 31, 2013 Restricted Stock	Apr. 21, 2014 Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance													450,000		1,160,000		3,000,000					300,000
Shares of common stock vested and exercisable												398,535
Shares of common stock unvested												53,167
Percentage of option price												100.00%
Stock option period	10 years													10 years			10 years
Common stock vesting period	3 years											3 years					3 years		3 years
Additional common stock reserved for future issuance																1,000,000
Number of options granted	52,500	52,500	0	52,500		0
Number of options exercised		0	0	0		108,146
Intrinsic value of outstanding exercisable options		$ 0		$ 0		$ 98,000
Weighted average term																		3 years
Common stock reserved for future issuance																				853,500	1,257,500
Restricted shares forfeited under stock incentive plan																				7,000	36,000
Weighted average grant date fair value																					$ 1.94
Shares available for issuance under stock incentive plan		636,453		636,453		680,953	381,170													951,000
Unrecognized compensation expense for restricted stock		2,273,000		2,273,000		1,019,000
Stock-based compensation		$ 229,000	$ 509,000	$ 361,000	$ 701,000			$ 229,000	$ 509,000	$ 361,000	$ 701,000